Question

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Answer 1

Răspuns:

Explicație pas cu pas:

 

Answer 2

Răspuns:

Explicație pas cu pas:

a)

2(2x + 5) = 11(3x - 7)

4x + 10 = 33x - 77

33x - 4x = 10 + 77

29x = 87

x = 87 : 29 = 3

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b)

2(4x + 11) = 3(5x - 9)

8x + 22 = 15x - 27

15x - 8x = 22 + 27

7x = 49

x = 49 : 7 = 7

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c)

14(4x - 5) = 3(3x + 8)

56x - 70 = 9x + 24

56x - 9x = 70 + 24

47x = 94

x = 94 : 47 = 2

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d)

9(3x - 7) = 15(2x - 6)

27x - 63 = 30x - 90

30x - 27x = 90 - 63

3x = 27

x = 27 : 3 = 9

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e)

3(8x - 5) = 19(5x - 12)

24x - 15 = 95x - 228

95x - 24x = 228 - 15

71x = 213

x = 213 : 71 = 3

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f)

36(4x - 5) = 28(3x + 15)

144x - 180 = 84x + 420

144x - 84x = 180 + 420

60x = 600

x = 600 : 60 = 10