Answer:
(7, - 1 )
Step-by-step explanation:
4x + 8y = 20 → (1)
- 4x + 2y = - 30 → (2)
adding the 2 equations term by term eliminates x
0 + 10y = - 10
10y = - 10 ( divide both sides by 10 )
y = - 1
substitute y = - 1 into either of the 2 equations and solve for x
substituting into (1)
4x + 8(- 1) = 20
4x - 8 = 20 ( add 8 to both sides )
4x = 28 ( divide both sides by 4 )
x = 7
solution is (7, - 1 )
