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Sagot :

Bonsoir,

3x + 7(8 - x) + 4 = 60 + x

3x + 56 - 7x + 4 = 60 + x

3x - 7x - x = 60 - 56 - 4

-5x = 0

x = 0

4(x - 1) - 3(2 - x) = 2

4x - 4 - 6 + 3x = 2

4x + 3x = 2 + 4 + 6

7x = 12

x = 12/7

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