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Basically, the same way that you solve equations that have variables only on one side. The general idea is that you can add, subtract, multiply and divide both sides of the quantities by the same amount (as long as you don't multiply or divide by zero).
For example:
4x = 2x + 3
If you subtract 2x from both sides, you are left with:
2x = 3
Wiki User
∙ 13y ago
Wiki User
∙ 15y ago* You will need at least as manyequations as there are variables, e.g. for 2 variables using 2x + 3y = 11 and 5x - 10y = 10. * To solve a 2-variable equation: first rearrange one so one variable is in terms of the other; "5x - 10y = 10" becomes "x = 2 + 2y". * Next, substitute that equation into the other; 2x + 3y = 11 becomes 2(2 + 2y) + 3y = 11. * Now expand and simplify; 2(2 + 2y) + 3y = 11 2 * 2 + 2 * 2y + 3y = 11 4 + 4y +3y = 11 4 + 7y = 11 * Then rearrange it so the variable is on one side and numbers are on the other and simplify again; 7y = 11 - 4 7y = 7 y = 1 * Now go back to one of the original equations and substitute this value to find the other; 2x + 3y = 11 2x + 3 * 1 = 11 2x + 3 =11 2x = 11 - 3 2x = 8 x = 4.
Wiki User
∙ 13y agoManipulate the equation to get all the variables on one side of the equal sign, and the numbers on the other side; then solve. For example, 2x = 10, divide both sides by 2, then the solution is x = 5.
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Can you solve for a variable in an equation?
Sure. You can always 'solve for' a variable, and if it happens to be the only variable in the equation, than that's how you solve the equation.
Can you solve for a variable in an expression or equation?
you can only solve for one in an equation so it can equal something
Can you solve a variable with an equation?
When an equation has a variable in it (only one), then there are only certainvalues the variable can have that will make the equation a true statement."Solving" the equation means finding those values for the variable.
What is the math term VEST?
variable equation solve it test it
How does writing equivalent equations help you solve a system of equations?
You can write an equivalent equation from a selected equation in the system of equations to isolate a variable. You can then take that variable and substitute it into the other equations. Then you will have a system of equations with one less equation and one less variable and it will be simpler to solve.
What number when substituded for the variable in an equation makes the equation true?
you have to solve the actual equation in order to answer this about your variable
How do you use different techniques to solve linear equations?
There are several techniques to solve linear equations. One common technique is the elimination method, where you eliminate one variable by adding or subtracting equations. Another technique is substitution, where you solve one equation for a variable and substitute it into the other equation. You can also use matrices and row operations to solve linear equations.
When using the substitution to solve nonlinear system of equations you should first see if you can one variable if you can one variable in one of the equation in the system?
The general idea is to solve one of the equations for one variable - in terms of the other variable or variables. Then you can substitute the entire expression into another equation or other equations; as a result, if it works you should end up having one less equation, with one less variable.
How doI solve system of equations by substitution?
Assuming the simplest case of two equations in two variable: solve one of the equations for one of the variables. Substitute the value found for the variable in all places in which the variable appears in the second equation. Solve the resulting equation. This will give you the value of one of the variables. Finally, replace this value in one of the original equations, and solve, to find the other variable.
How do you solve for the indicated variable?
Algebraically manipulate the equation until you have the indicated variable on one side of the equation and all of the other factors on the other side.
Can you solve for a variable in an expression?
No, you can only simplify an expression. To solve for a variable, it must be in an equation.
What is an equation with one or two variables?
When you solve a one-variable equation, your goal is to isolate the variable.To isolate the variable means to make it be alone on one side of the equals sign.In the equation shown here, you can isolate the variable by subtracting 9 from both sides of the equation and simplifying
