Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown.
Level 1 · Warm-up
1 Solve x + 6 = 14.
Show worked solution
x = 14 − 6 = 8. Check: 8 + 6 = 14 ✓
2 Solve x − 3 = 10.
Show worked solution
x = 10 + 3 = 13. Check: 13 − 3 = 10 ✓
3 Solve 5x = 45.
Show worked solution
x = 45 ÷ 5 = 9. Check: 5(9) = 45 ✓
Level 2 · Core
4 Solve 2x + 5 = 17.
Show worked solution
2x = 12, so x = 6. Check: 2(6) + 5 = 17 ✓
5 Solve 5x − 8 = 32.
Show worked solution
5x = 40, so x = 8. Check: 5(8) − 8 = 32 ✓
6 Solve x ÷ 3 = 12.
Show worked solution
x = 12 × 3 = 36. Check: 36 ÷ 3 = 12 ✓
Level 3 · Challenge
7 Solve x ÷ 3 + 2 = 7.
Show worked solution
x ÷ 3 = 5, so x = 15. Check: 15 ÷ 3 + 2 = 7 ✓
8 Solve 4x − 9 = 23.
Show worked solution
4x = 32, so x = 8. Check: 4(8) − 9 = 23 ✓
9 Solve 7x + 12 = 61.
Show worked solution
7x = 49, so x = 7. Check: 7(7) + 12 = 61 ✓