Solving Equations
Letters on both sides, and brackets. The one rule is that an equation is a balance: whatever you do to one side, you do to the other.
No account, and the maths stays in your browser — more— less
This activity is for learning and practice. Anything it suggests is indicative only — it is not a formal assessment and not a substitute for a teacher or tutor.
Nothing you answer is sent to Zerdly. Progress is saved on this device only if you switch saving on, and you can delete it at any time. How Kids Maths handles data.
Set your country and age — change
Setting an age keeps the questions at the right level for that age. It does not lock anything — you can still try any topic, at any age, in any order. Levels are a guide only, not a curriculum.
Your age is not saved anywhere. Your country is remembered only if you have switched saving on.
Saving your progress
Nothing is being saved. You can practise as much as you like — when you close the tab, the session is gone.
Why this is harder than it looks
In 2n + 3 = 11 the letter appears once, so every step just undoes something. In 3n + 2 = n + 10 it appears twice, and undoing on its own gets you nowhere — you first have to take n off BOTH sides so the letters end up together. That is the new move, and it is the one that makes algebra suddenly feel like a different subject.
Say it as a balance, not as a trick
Move it over and change the sign is a description of what happened, not a reason, and it is where sign errors come from. Take 2n off both sides is the actual move: the scales stay level because the same thing was removed from each pan.
Brackets multiply everything inside
3(n + 4) is not 3n + 4. The 3 multiplies the whole bracket, so it is 3n + 12. You can either multiply it out first or divide both sides by 3 and deal with a much simpler equation — both work, and this tool explains whichever is shorter.
School levels
School levels are a guide only. They show where a skill is usually taught in each country and are not taken from, aligned to, or endorsed by any curriculum authority. Your school may cover it earlier or later.