Answer: c = 3
Step-by-step explanation: First, make sure you simplify the left side of the equation by combining our c terms together.
So we have 9c - 6c - 2c + 5c which simplifies to 6c.
So now we have the equation 6c = 18.
To solve for c in this equation, we want to get c by itself on the left side of the equation. Since c is being multiplied by 6, to get c by itself, we need to divide by 6 on the left side of the equation. Since we divided by 6 on the left side, we must also divide by 6 on the right side.
On the left side, the 6's cancel out so we're simply left with c. On the right side we have 18 divided by 6 which is 3 so we have c = 3.