1. x + 12 = 35

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2. x - 8 = 20

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3. 3x = 42

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4. x ÷ 6 = 7

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5. x + 4.5 = 9.5

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6. x - 2.3 = 4.7

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7. 2x + 10 = 30

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8. 3x - 12 = 15

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9. 5x = 3x + 14

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10. 16 + 2x = 40

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11. 4(x + 3) = 32

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12. (x - 5) × 3 = 24

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13. 0.2x + 1.5 = 3.5

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14. 2(2x + 1) = 18

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15. 5x - 2x = 30

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16. 3x + 4x = 56

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17. 20 - x = 8

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18. 88 - 4x = 16

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19. x ÷ 3 = 2.5

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20. 1.5x + 2.5x = 20

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21. 7(x - 1.2) = 11.2

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22. 12x - 3 = 6x + 15

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23. 9x - 4x + 10 = 30

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24. x + x + 6 = 24

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25. 4x - 8 = 3x + 4

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26. 5(x - 3) = 2(x + 6)

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27. 2.5x - 0.5x = 16

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28. 3(x + 2) = 4(x - 1)

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29. 7x + 8 = 5x + 18

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30. x + (x + 8) = 42

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