Question

help me solve this

6x+8y=18 and 5x-8y=-34

Answer 1

Since you have 8y in the first, and -8y in the second, simply add the two equations together. You get 11x = -16 or x = -16/11.

Then substitute x back in, and solve for y.

Answer 2

6x+8y=18
5x-8y=-34 Add the equations to get:

11x=-16
x=-16/11

Substitute the x value above into one of the equations to get:

6x+8y=18
(6)(-16/11)+8y=18
-96/11+8y=18
8y=18+96/11
8y=198/11+96/11
8y=294/11 Divide both sides by 8 to find y:
y=294/88