Question

In order to solve the following system of equations by addition, which of the

following could you do before adding the equations so that one variable will
minated when you add them?
4x - 2y=7
3x - 3y=15

Answer 1

Below.

Explanation:

You could multiply the first equation by 3 and the second one by -2 so that the 2 y terms would be -6y and 6y:

12x - 6y = 21

-6x + 6y = -30

Adding these will eliminate the y variable.