Question

Substitution 4x+6y=32. x=2y+16

Answer 1

4(2y+16)+6y=32
14y+16+=32
y=1.14
x=18.28

Answer 2

4x + 6y = 32
x = 2y + 16

4(2y + 16) + 6y = 32
8y + 64 + 6y = 32
8y + 6y = 32 - 64
14y = - 32
y = -32/14...reduces to -16/7

x = 2y + 16
x = 2(-16/7) + 16
x = - 32/7 + 16
x = -32/7 + 112/7
x = 80/7

solution is (80/7 , -16/7)