Question

Solve using substitution:
2y − x + 2 = 0
-3x + 8y = -5

a. (-10, 4)
b. (3, 1/2)
c. (2, 0)
d. (4, 1)

Answer 1

b. (3, 1/2)

Answer 2

2y - x +2 = 0

add x toboth sides

2y + 2 = x

now substitute this into the x of the second equation

-3(2y +2) + 8y = -5
-6y - 6 + 8y = -5
2y - 6 = -5
2y = -5 + 6
2y = 1

do you get it?