Question

Solve the system of equations -2x-3y=48 and -x+2y=-11 by cobing the equations

Answer 1

x = -9 and

y = -10

Explanation:

a) - 2x - 3y = 48

b) - x + 2y = - 11

b) 2y + 11 = x

a) -2(2y + 11) - 3y = 48 (substitution)

- 4y - 22 - 3y = 48

-7y = 48 + 22

-7y = 70

y = 70/- 7

y = -10

b) -x + 2(-10) = - 11

- x - 20 = - 11

- x = -11 + 20

- x = 9

x = -9