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I need to do this class soon, please help me

I need to do this class soon, please help me-example-1

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Answer:

Explanation:

18. x + 25 = 55

x = 30

19. 2x - 5 = 95

2x = 100

x = 50

20. 3x - 22 = 2x + 26

x - 22 = 26

x = 48

21. 3x - 18 + 105 = 180

3x + 87 = 180

3x = 93

x = 31

22. 19x + 17x = 180

36x = 180

x = 5

27(5) = 135

23. 5x + 40 + 2x = 180

7x + 40 = 140

7x = 140

x = 20

5(20) = 100

2(20) = 40

5(20) + 40 = 100 + 40 = 140

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