Question

Solve the simultaneous equations − x + 4 y = − 12 x + 2 y = − 18

Answer 1

Answer:

equations

Step-by-step explanation:

1:6x+2y=10 2:12x +4y=21 equations 1, multiplied by 2:12x+4y=20

Answer 2

Answér :

x = -8 , y = -5

Solution :

Here ,

The given equations are ;

-x + 4y = -12 -------(1)

x + 2y = -18 ---------(2)

Now ,

Adding eq-(1) and (2) , we get ;

=> -x + 4y + x + 2y = -12 + (-18)

=> 4y + 2y = -12 - 18

=> 6y = -30

=> y = -30/6

=> y = -5

Now ,

Putting y = -5 in the eq-(2) , we get ;

=> x + 2y = -18

=> x + 2•(-5) = -18

=> x - 10 = -18

=> x = -18 + 10

=> x = -8

Hence ,

x = -8 , y = -5