Question

Use substitution method
27x +31y =85
31x+27y =89

Answer 1

By using substitution method:
27x+31y=85
27x=85-31y
x=85-31y/27

Substituting the value of x in the equation 31x+27y=89
31[(85-31y)/27]+27y=89
(2635-961y+729y)/27=89
2635-232y=2403
-232y=2403-2635
y=1

x=85-31/27
x=2

Hope it helps!!