Question

Solve the following simultaneous equation using cramer's rule x+18=2y; y=2x-9​

Answer 1

Answer:

x = -48 ; y = - 15

Step-by-step explanation:

x -2y + 18 =0 ; 2x - y -9 =0

multiply by 2 in eq 1

2x - 4y +36 =0 ; 2x-y-9=0

2x - 4y + 36 = 0

2x - y - 9 = 0

- + + by subtraction

we got - 3y = 45

y = - 15

putting value of y in eq i

x - 2 (-15) +18 =0

x + 48 = 0

x = -48

value of x and y is -48 and -15