Use the substitution method to solve the system of equations. choose the
correct ordered pair.
x + 2y = 12
- x= -y-6
o a. (6.0)
o b. (8,2)
c. (9,3)
(7.1)

The correct option is B

Step-by-step explanation:

The  given equation is:

x + 2y = 12  equation 1

- x= -y-6. equation 2

lets take equation 2:

-x=-y-6

Take minus as common on R.H.S

-x= -(y+6)

x=y+6  (Lets call it equation 3)

Substitute the value of x in the first equation:

x+2y=12

y+6+2y=12

Combine the like terms:

y+2y = 12-6

3y=6

Divide both the sides by 3

3y/3=6/3

y=2

Now substitute the value of y in equation 3:

x=y+6

x=2+6

x=8

Thus the solution set is (x,y){(8,2)}.

The correct option is B

i am sorry it just submitted an answer but the answer is 365 boys. hopes this

step-by-step explanation:

e) none of the above because the measure of angle cba is 101°