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Find X

💡Benefits

What does X equal in the equation?

🎮How to play

What does X equal in the equation?

Frequently asked questions

No, solving for the unknown X on MentalMath is free and opens without registration.
Finding the unknown in a simple equation prepares a child for algebra and teaches the feel of balance between the two sides.
Recommended from age 7, beginning with simple equations using small numbers.
Yes, once you see the equation you can enter the value of X on a phone, tablet or computer.
5-10 minutes a day improves the ability to find the unknown quickly and handle equations.
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