Answer:
(- 1, 3 )
Step-by-step explanation:
Given the 2 equations
y - 4x = 7 → (1)
2y + 4x = 2 → (2)
Eliminate x by adding the 2 equations term by term
(y + 2y) + (- 4x + 4x) = (7 + 2), that is
3y = 9 ( divide both sides by 3 )
y = 3
Substitute y = 3 in either of the 2 equations and solve for x
Using (2), then
(2 × 3) + 4x = 2
6 + 4x = 2 ( subtract 6 from both sides )
4x = - 4 ( divide both sides by 4 )
x = - 1
Solution is (- 1, 3 )
