Answers.com > Wiki Answers > Categories > Jobs & Education > Education > School Subjects > Math and Arithmetic > How do you solve a system of equation with 3 equations and 3 variables?

How do you solve a system of equation with 3 equations and 3 variables?

Answer:
If you know matrix algebra, the process is simply to find the inverse for the matrix of coefficients and apply that to the vector of answers.
If you don't:
You solve these in the same way as you would solve a pair of simultaneous linear equations in two unknowns - either by substitution or elimination.

For example, change the subject of one of the equations to express one of the variables in terms of the other two. Substitute this value into the other two equations. When simplified, you will have two linear equations in two variables.
First answer by Mehtamatics. Last edit by Mehtamatics. Contributor trust: 610 [recommend contributor recommended]. Question popularity: 2 [recommend question].

Can you answer these Math and Arithmetic questions?

What are angles that share a vertex and side? Answer it!
What do you call a triangle with no equal angles or sides? Answer it!
What is negative appraisal? Answer it!
Why cotton is used as plug in culture media even though its pore size is greater than bacterial diameter? Answer it!
Is a prism a regular polyhedron? Answer it!

Relevant answers:

Home

Answer these

Do dwarf hamsters eat their young?
In: Hamster Behavior
Answer it!
What is difference between public affairs reporting and other forms of reporting?
In: Book Reports
Answer it!
What is the reason for the widespread poverty in Mexico?
In: Poverty
Answer it!
When was Mr Rahul Singh born?
In: Celebrity Births Deaths and Ages
Answer it!
» more

Featured guides

» More