Alright so, in order to solve an equation, you must have the unknown by itself.
So, we first subtract 7 from both sides and get a new equation.
-6x = 72
Now we divide by -6 so that x is by itself.
x = -12.
Now, -12 is a *possible* solution to the equation. The way to find out is to check. Checking the answer means "plugging in" the number into the equation, and seeing if it solves. so.
-6 * -12 + 7 = 79
72 + 7 = 79
79 = 79
So, since the answer checked out, -12 is a solution to the equation.
Hope this helps.
