PuzzleM8 Learning games for families

One-step equations

Solve x + 2 = 13

The aim is to get x on its own. Whatever we do to one side, we do to the other, so the equation stays balanced. This one takes 1 step.

  1. x + 2 = 13The question.

  2. Step 1: Subtract 2 on both sides −2

    On the left, the x part has + 2 with it. Take 2 away from both sides to get rid of it.

    x = 11

    On the left, the 2 cancels out. x is on its own. x = 11.

    + 2 is undone by − 2.

Answer: x = 11

Check it

Put x = 11 back into the question. If both sides come to the same number, the answer is right.

Left side: x + 2 → 11 + 2 = 13

Right side: 13 → 13

✓ Both sides are 13, so x = 11 is right.

Now try it yourself

Solve this one in Algebra Balance. You choose each step, and it explains what happened, with hints if you get stuck.

Practise this in Algebra Balance

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