Question

Enter the variable that is easiest to solve for in this system of equations.
y=5x+5
3y=5x+7

Answer 1

x: Since you already have y in terms of x simply plug in y=5x+5 into the second equation.
3(5x+5)=5x+7 then solve for x.

Answer 2

y. you can use elimination and simply get rid of all the "x"s and be left with an equation of y

-y=-5x-5
3y=5x+7

when we add these vertically:
2y=2
y=1
then we can solve for x