Question

May you tell me which equation you would choose to solve for one of the variables and explain please.

Answer 1

This is a simultaneous system of equations, we would need both equations, to solve for the variables.

we have

2x - 3y = 6 - ---i

x +7y = 2------ii

Let's modify equation ii, x +7y = 2 means x = 2 - 7y

Anywhere we see x in equation i, lets put in 2 - 7y instead

2( 2 - 7y) - 3y = 6

4 - 14y - 3y = 6

4 - 17y = 6

-17y = 2

y = -2/17

Lets put this result in equation ii