-2y+y=6

-y=6

y=-6

substitute y into second equation 4x-2y=5

4x-2(-6)=5

4x+12=5

4x=-7

\(\displaystyle{x}=-\frac{{7}}{{4}}\)

answer: \(\displaystyle{x}=-\frac{{7}}{{4}}\), y=-6

-y=6

y=-6

substitute y into second equation 4x-2y=5

4x-2(-6)=5

4x+12=5

4x=-7

\(\displaystyle{x}=-\frac{{7}}{{4}}\)

answer: \(\displaystyle{x}=-\frac{{7}}{{4}}\), y=-6