What is the value of x in the equation - x = 3 - 4x + 15?

A. - 18

B. - 6

C. 6

D. 18

This exercise is asking you to find the value of x or solve for x, to do so you have to isolate or leave x alone by doing different mathematical operations according to the given equation.

The given equation is - x=3-4x+15, which is a three step equation meaning that in order to solve for x you have to perform three different mathematical operations, in this case combining of like terms, addition, and division.

-x=3-4x+15 Combine like terms

-x=-4x+18 Add 4x in both sides

3x=18 Divide by 3 in both sides to isolate x

x=6

The value of x in the equation is 6 or letter C from the given choices.