9x - 6y = -21 and 6x - 12y = -6 How would I solve by substitution?

(-3,-1)

Step-by-step explanation:

6x-12y=-6

6x=12y-6

x=2y-1

9(2y-1)-6y= -21

18y-9-6y=-21

12y= -12

y=-1

6x-12(-1)=-6

6x+12= -6

6x=-18

x=-3

x = -3 ; y = -1

Step-by-step explanation:

Let 9x - 6y = -21 be eqn.1 & let 6x - 12y = -6 be eqn.2 .

Lets find the value of x from eqn.1

Now , lets put the value of x (which we got from eqn.1) in eqn.2 :-

(Putting x here)

Now , lets find the value of x.

Putting y = -0.5 gives ,

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6