Question

Given the equation and solution, find the missing coefficient.
12x + 6 =____ x − 12
Solution: x = -9

Answer 1

Let c be that missing coefficient, so

12x + 6 = c*x - 12

Plug in x = -9 to get

12(-9) + 6 = c*(-9) - 12

-108 + 6 = -9c - 12

-102 = -9c - 12

Now solve for c to find the missing coefficient.

Answer 2

10

Answer 3

good you got it