Question

solve by substitution;
2 = 2y -x
23 = 5y - 4x

Answer 1

2-2y=x
Substitute this in the second equation:
23=5y-4(2-2y)
23=5y-8+8y
23+8=13y
31=13y
31/13=y
Substitute value of y in 1st equation:
2=2(31/13) -x
2+x = 62/13
x=62/13 -2
x=36/13.