Answer: x = 4
Explanation: Since our variable x appears on both sides of the equation, we want to put our x terms together on one side of the equation and put our numbers together on the other side of the equation.
Let's put our variables on the right by subtracting 4x from both sides.
This gives is 7 = 5x - 13.
Now we can add 13 to both sides to get 20 = 5x.
Finally, divide both sides by 5 and 4 = x or x = 4.