Mathematics Grade 8
How to solve a two-step equation
Learn how to solve 3(x + 2) = 21 with a clear preview of the two-step method. Sign in to unlock every working step and the final check.
The question
Solve 3(x + 2) = 21.
Public preview
Start by undoing the multiplication
Divide both sides by 3 first. Then isolate x by undoing the addition inside the brackets. A full worked answer includes a substitution check in the original equation.
Worked answer
See every step, then check your answer.
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