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 5x = 2x + 9.
Show worked solution
3x = 9, so x = 3. Check: 5(3) = 15 = 2(3) + 9 ✓
2 Solve x ÷ 4 = 6.
Show worked solution
x = 24. Check: 24 ÷ 4 = 6 ✓
3 Solve 6x − 5 = 4x + 7.
Show worked solution
2x − 5 = 7 → 2x = 12 → x = 6.
Level 2 · Core
4 Solve (x + 2) ÷ 3 = 5.
Show worked solution
x + 2 = 15, so x = 13.
5 Solve 7x − 4 = 3x + 16.
Show worked solution
4x − 4 = 16 → 4x = 20 → x = 5.
6 Solve x/2 + x/5 = 7.
Show worked solution
5x + 2x = 70 → 7x = 70 → x = 10.
Level 3 · Challenge
7 Solve x/3 + x/4 = 7.
Show worked solution
4x + 3x = 84 → 7x = 84 → x = 12.
8 Solve (2x − 1)/5 = (x + 4)/4.
Show worked solution
4(2x − 1) = 5(x + 4) → 8x − 4 = 5x + 20 → 3x = 24 → x = 8.
9 Solve 4(x − 1) = 2x + 10.
Show worked solution
4x − 4 = 2x + 10 → 2x = 14 → x = 7.