Question

What is the value of x when -3x+7x=-12?

Answer 1

-3x + 7x = -12 equals x = -3.

First, simplify -3x + 7x to 4x. / Your problem should look like: 4x = -12.
Second, divide both sides by 4. / Your problem should look like: x = $- \frac{12}{4}$ . 
Third, simplify $\frac{12}{4}$ to 3. / Your problem should look like: x = -3, which is your answer.