Answer:
x = - 5 , y = 4
Explanation:
given the system of equations
4x - 5y = - 40 → (1)
- 3x + y = 19 ( add 3x to both sides )
y = 3x + 19 → (2)
substitute y = 3x + 19 into (1)
4x - 5(3x + 19) = - 40 ( simplify left side )
4x - 15x - 95 = - 40
- 11x - 95 = - 40 ( add 95 to both sides )
- 11x = 55 ( divide both sides by - 11 )
x = - 5
substitute x = - 5 into (2)
y = 3(- 5) + 19 = - 15 + 19 = 4
solution is x = - 5 , y = 4