Answer:
(- 4, 16 )
Step-by-step explanation:
y = 3x + 28 → (1)
y = - 4x → (2)
substitute y = 3x + 28 into (2)
3x + 28 = - 4x ( add 4x to both sides )
7x + 28 = 0 ( subtract 28 from both sides )
7x = - 28 ( divide both sides by 7 )
x = - 4
substitute x = - 4 into (2)
y = - 4(- 4) = 16
solution is (- 4, 16 )
