Answer:
(1, - 1 )
Explanation:
y = - 2x + 1 → (1)
2x - 2y = 4 → (2)
Substitute y = - 2x + 1 into (2)
2x - 2(- 2x + 1) = 4 ← distribute parenthesis and simplify left side
2x + 4x - 2 = 4
6x - 2 = 4 ( add 2 to both sides )
6x = 6 ( divide both sides by 6 )
x = 1
Substitute x = 1 into (1)
y = - 2(1) + 1 = - 2 + 1 = - 1
solution is (1, - 1 )