Find x so that ( x, -16 ) is a solution to 2x + 3y = 12.

30

Step-by-step explanation:

Start with 2x + 3y = 12.  Substitute -16 for y, obtaining 2x + 3(-16) = 12.  Simplify this and then solve the resulting equation for x:

2x - 48 = 12, or 2x = 60.

Dividing both sides by 2 results in x = 30.

(30, -16) is a solution of  2x + 3y = 12.

250

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.