PuzzleM8 Learning games for families

One-step equations

Solve x + 4 = 16

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 + 4 = 16The question.

  2. Step 1: Subtract 4 on both sides −4

    On the left, the x part has + 4 with it. Take 4 away from both sides to get rid of it.

    x = 12

    On the left, the 4 cancels out. x is on its own. x = 12.

    + 4 is undone by − 4.

Answer: x = 12

Check it

Put x = 12 back into the question. If both sides come to the same number, the answer is right.

Left side: x + 4 → 12 + 4 = 16

Right side: 16 → 16

✓ Both sides are 16, so x = 12 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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