.Solve the system of equations. Use elimination
x + 2y = -3
x - y = -12
a) (-9,3)
b) (-7,5)
c) (9, 6)
d) (3, 15)

a) (-9,3)

Step-by-step explanation:

   x + 2y = -3

- (x -    y = -12)

x + 2y = -3

- x + y =  12

       3y =  9

          y = 3

x - y = -12

x- 3 = -12

x= - 9

(-9, 3)

your answer is 23/2 - 13.5

step-by-step explanation:

7/2 evaluates to

multiply x and 4.5

multiply x and 1

the x just gets copied along.

the answer is x

x

4.5*x evaluates to 4.5x

multiply 3 and 4.5x

multiply 1 and x

the x just gets copied along.

x

4.5*x*3 evaluates to 13.5x

7/2-4.5*x*3 evaluates to

  + 8 =

the answer is

7/2-4.5*x*3+8 evaluates to

if im undersanding the question correctly, its organized from 10

step-by-step explanation: