Solve for the unknown in the equation.
5(x-4) = 25
Eliminate the parentheses.
5x – 20 = 25
Add the known value to both sides of the equation.
5x – 20 + (20) = 25 + (20)
5x = 45
Divide both sides of the equation by the known factor to isolate the unknown value.
x = 9
Check the solution by substituting the answer in the original equation and verifying that a true statement results.
The answer checks, so the solution of the equation is 9.