Answer:
(4, - 2 )
Explanation:
4x + 2y = 12 → (1)
- 4x + y = - 18 → (2)
adding the 2 equations term by term will eliminate x
(4x - 4x) + (2y + y) = 12 - 18
0 + 3y = - 6
3y = - 6 ( divide both sides by 3 )
y = - 2
substitute y = - 2 into either of the 2 equations and solve for x
substituting into (1)
4x + 2(- 2) = 12
4x - 4 = 12 ( add 4 to both sides )
4x = 16 ( divide both sides by 4 )
x = 4
solution is (4, - 2 )