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How do you rewrite this equation so that y is a function of x -- 3x plus 5y equals 7?

In: Algebra [Edit categories]

Answer:

Several possibilities

Because of the limitations of the question software, it was not possible to determine what the original equation was supposed to be, so we assumed it is 3x + 5y = 7. It could have just as easily been 3x - 5y = 7, or even 3x/5y = 7.

So, let's solve them all for x.

3x + 5y = 7

3x = 7 - 5y

x = (7 - 5y)/3

How about 3x - 5y = 7?

3x - 5y = 7

3x = 7 + 5y

x = (7 + 5y)/3

And 3x/5y = 7?

3x/5y = 7

3x = 35y

x = 35y/3

Solving for y

The above equations wrote the equation so that x is a function of y, not the other way around. Here's how to rewrite the equation so that y is a function of x:

3x + 5y = 7

5y = -3x + 7

y = (-3x + 7)/5

First answer by Kessondra. Last edit by Packerfan14. Contributor trust: 7 [recommend contributor ]. Question popularity: 13 [recommend question].

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