Andrew M. answered • 08/14/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
7x-8y=-5
-8x+9y=6
-8x+9y=6
We can use elimination. Let's eliminate the x
variable. Multiply the first equation through by
8 and the 2nd equation by 7 and add the equations.
56x - 64y = -40
-56x +63y = 42
-----------------------
-y = 2
y = -2
Plug -2 in for y in one of the original equations
and solve for x
