Answer:
x=
16
333
y=
8
283
Step-by-step explanation:
1 Solve for yy in 13+2x+y+90=18013+2x+y+90=180.
y=-2x+77y=−2x+77
2 Substitute y=-2x+77y=−2x+77 into 4x+1+8x-2y=1804x+1+8x−2y=180.
16x-153=18016x−153=180
3 Solve for xx in 16x-153=18016x−153=180.
x=\frac{333}{16}x=
16
333
4 Substitute x=\frac{333}{16}x=
16
333
into y=-2x+77y=−2x+77.
y=\frac{283}{8}y=
8
283
5 Therefore,
\begin{aligned}&x=\frac{333}{16}\\&y=\frac{283}{8}\end{aligned}
x=
16
333
y=
8
283
Done
