3. What value of x makes the equation below true?

5x+4 = 9x-12

Step-by-step explanation:

Get all the x's to one side and all the non x's to the other. we could do 5x-9x = - 12-4.

We get - 4x = - 16. Then, divide by - 4. Dividing two negatives gets a positive. So, - 16/-4 = 4

the answer is 4