Question

8x + 5y = –5
7x – 3y = 3
solve for y.

Answer 1

x=(-5y-5)/8
7((-5y-5)/8)-3y=3

Answer 2

Solving the second equation
\[x = 3 + 3y/7\]
then substitute into the 1st equation

\[8/7*(3 + 3y) + 5y = -5\]
then solve for y
\[24/7*3y + 5y = -5 - 24*3/7\]
so y = 1

Answer 3

Whoops I think y = -1