What is the solution of the system?

{-3x+9y=364x+12y=24

Enter your answer in the boxes.

What you must do for this case is to solve the system of two equations with two unknowns.

To find the values of x and y.

We have then:

-3x + 9y = 36

4x + 12y = 24

Resolving:

Step 1:

(1/3) * ( - 3x + 9y) = (36) * (1/3)

(1/4) * (4x + 12y) = 24 * (1/4)

-x + 3y = 12

x + 3y = 6

Step 2:

6y = 18

y = 18/6

y = 3

Step 3:

-x + 3y = 12

-12 + 3y = x

-12 + 3 (3) = x

x = - 3

answer:

x = - 3

y = 3