Question

For question 5, use elimination or substitution.
5) x + 2y = 16
X- y = -2

Answer 1

x = 4

y = 6

Explanation:

x + 2y = 16 _______(1)

x - y = -2_______(2)

(1) - (2)

`x + 2y - (x - y) = 16 - ( - 2) \\ x + 2y - x + y = 16 + 2 \\ 2y + y = 18 \\ 3y = 18 \\ y = (18)/(3) \\ y = 6 \\`

y = 6,

`x + 2y = 16 \\ x + 2(6) = 16 \\ x + 12 = 16 \\ x = 16 - 12 \\ x = 4 \\`