Question

Solve the simultaneous equations x − 4 y = 27 x − y = 9

Answer 1

Answer:

x = 3 and y = -6

Step-by-step explanation:

soln

given

The given equations are x - 4 y = 27 and x - y = 9.

x = 9 + y.

x - 4 y = 27.

9 + y - 4 y = 27.

9 - 3 y = 27.

- 3 y = 27 - 9.

- 3 y = 18.

y = - 18 ÷ 3.

y = -6.

x = 9 + y

x = 9 - 6

x = 3.

therefore, x =3 and y = -6.

HOPE! IT HELPS .