AlgebraKey Stage 3

Solving equations - with unknowns on both sides

Collect the unknown terms on one side and the constants on the other.

  • Add or subtract the same expression on both sides to keep the equation balanced.
  • Collect the unknown terms on one side, then undo the remaining operations.
  • Substitute your answer into the original equation to check it.

Example 1

Solve the equation.

Example 2

Solve the equation.

Your turn

Question 1

Solve.

Check answer
Question 2

Solve.

Check answer
Question 3

Solve.

Check answer
Question 4

Solve.

Check answer
Question 5

Solve.

Check answer
Expand the brackets, then collect like terms.
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