Question

va rogg,ajutati maaa​

Answer 1

Răspuns:

Explicație pas cu pas:

(4 + x)/(6 + x) = 9/11

11(4 + x) = 9(6 + x)

44 + 11x = 54 + 9x

11x - 9x = 54 - 44

2x = 10

x = 5

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(4 + x)/(6 + x) = 4/6

6(4 + x) = 4(6 + x)

24 + 6x = 24 + 4x

6x - 4x = 24 - 24

2x = 0

x = 0

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(4 + x)/(6 + x) = 7/9

9(4 + x) = 7(6 + x)

36 + 9x = 42 + 7x

9x - 7x = 42 - 36

2x = 6

x = 6 :2 = 3

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succes la ultimul subpunct!