Solve by substitution x-y=-11 y+7=-2x

x - y = - 11 ... (1)

y + 7 = - 2x ... (2)

from equation (1)

x - y = - 11

x = - 11 + y ... (3)

putting x in equation (2)

y + 7 = - 2 x

y + 7 = - 2 (-11 + y) y + 7 = 22 - 2 y y + 2 y = 22 - 7

3 y = 15 y = 15 / 3

putting value of y in equation 3

x = - 11 + (13 / 5) x = - 33 / 3 + 15 / 3 (l. c. m)

x = - 17 / 5

check

x = - 11 + y

- 17 / 5 = - 11 + 13 / 5

-17 / 5 = - 17 / 5