One-step equations
Solve x + 4 = 8
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.
- x + 4 = 8The question.
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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 = 4On the left, the 4 cancels out. x is on its own. x = 4.
+ 4 is undone by − 4.
Answer: x = 4
Check it
Put x = 4 back into the question. If both sides come to the same number, the answer is right.
Left side: x + 4 → 4 + 4 = 8
Right side: 8 → 8
✓ Both sides are 8, so x = 4 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