Question

11x + 15y + 23 = 0 and 7x - 2y - 20 = 0 by substitution method ​

Answer 1

Answer:

x=2

y=-3

• Step-by-step explanation:

11x + 15y + 23 = 0 ---------------------(1)

7x - 2y - 20 = 0  -------------------(2)

2y = 7x - 20

y = 7x/2 - 10        put in equation (1)

11x + 105x/2 -150 + 23 = 0

127x/2 - 127 = 0

x = 2    put in equation (2)

14 - 2y - 20 = 0

y = -3