Question

If -21-9g=-3g then 4g=?

Answer 1

-21 - 9g = -3g

9g is subtracting on the left, then it will add on the right

-21 = -3g + 9g

-21 = 6g

6 is multiplying on the right, then it will divide on the left

-21/6 = g

-7/2 = g

Finally,

4g = 4*(-7/2) = -14