1. $x + 2 = 5$ 解答: $x = 3$
2. $2x = 4$ 解答: $x = 2$
3. $x - 3 = 4$ 解答: $x = 7$
4. $4x - 5 = 15$ 解答: $x = 4$
5. $x - 7 = 3$ 解答: $x = 10$
6. $3x + 4 = 10$ 解答: $x = 2$
7. $3x - 10(10 - x) = 100$ 解答: $x = 5$
8. $54(x + 2) = 5(x - 2)$ 解答: $x = -2$
9. $2.25x + 25.5x = 2x + 25$ 解答: $x = 10$
10. $33x + 1 = 16$ 解答: $x = 1$
11. $12x - 10(x - y) = 100$ 解答: $x = 50 + 10y$
12. $80x + 80y = 400$ 解答: $x = 0, y = 5$
13. $\frac{x - 4(18 - x - y)}{60} \div 4 = \frac{18 - y}{60}$ 解答: $x = 2, y = 2$
14. $x = 4y$ 解答: $x = 3y$
15. $3x + 11 - x - y = 25$ 解答: $x = 7 + \frac{y}{2}$
16. $\frac{3a - 123 + 73}{4a + 163 + 37} = \frac{1}{2}$ 解答: $a = 150$
17. $11x - 2x = 100 - 9x$ 解答: $x = 10$
18. $2x + 1x - 14 - 3x = 5x - 6$ 解答: $x = 4$
19. $5x - 2 = 3x + 4$ 解答: $x = 3$
20. $3(2x - 1) - 5 = 4(3 - x)$ 解答: $x = 1$
21. $2(x - 1) + 3(x + 2) = 12$ 解答: $x = 2$
22. $3(5x - 2) - 2(3x + 4) = 15$ 解答: $x = 3$
23. $3(2x + 1) + 4(x - 3) = 5 - x$ 解答: $x = 4$
24. $5(x - 2) = 3(2x + 1) + 4$ 解答: $x = 1$
25. $2(3x + 5) = 3(2 - x)$ 解答: $x = 1$
26. $5(x - 1) = 2(x + 4)$ 解答: $x = 3$
27. $3(x + 5) = 4(x - 2)$ 解答: $x = 17$
28. $x + 5 = 17$ 解答: $x = 12$
29. $2x - 4 = 10$ 解答: $x = 7$
30. $x - 8 = 12$ 解答: $x = 20$
31. $3x + 6 = 24$ 解答: $x = 6$
32. $4x - 10 = 20$ 解答: $x = 7.5$
33. $x + 10 = 30$ 解答: $x = 20$
34. $2x - 15 = 5$ 解答