Answer:
(- 4, - 9 )
Explanation:
y = 2x -1 → (1)
y = 4x + 7 → (2)
substitute y = 4x + 7 into (1)
4x + 7 = 2x - 1 ( subtract 2x from both sides )
2x + 7 = - 1 ( subtract 7 from both sides )
2x = - 8 ( divide both sides by 2 )
x = - 4
substitute x = - 4 into either of the 2 equations and solve for y
substituting into (1)
y = 2(- 4) 1 = - 8 - 1 = - 9
solution is (- 4, - 9 )