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Sagot :

72 + 2x + x = 180

72 + 2x + x -72 = 180 - 72

2x + x = 108

3x =108

3x/3 = 108/3

x=36

Bonsoir,

72 + 2x + x = 180

2x + x = 180 - 72

3x = 108

x = 108/3

x = 36.

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