Solve using substitution method
3x+8y=20
x=24-7y
3x+8y=20
x=24-7y
3(24 - 7y) + 8y = 20
72 - 21y + 8y = 20
-13y = -52
y = 4
Substitute 4 for y in the first equation and solve.
3x+8y=20
x=24-7y
x=24-7y
3(24 - 7y) + 8y = 20
72 - 21y + 8y = 20
-13y = -52
y = 4
Substitute 4 for y in the first equation and solve.