Answer: x = -9
Step-by-step explanation: To solve for x, we first isolate
the term containing x which in this case is 2x.
Since 3 is being added to 2x,
we subtract 3 from both sides of the equation.
On the left, the +3 and -3 cancel out
and on the right, -15 - 3 is -18.
So we have 2x = -18.
Now we can finish things off by dividing
both sides of the equation by 2.
On the left, the 2's cancel and on
the right, -18 divided by 2 is -9.
So we have x = -9 which is the solution to this equation.
