Hello,
a) 9x + 50 = 5x + 250
b) 9x - 5x = 250 - 50
4x = 200
x = 200/4 = 50.
Une bille pèse 50 grammes.
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Hello,
a) 9x + 50 = 5x + 250
b) 9x - 5x = 250 - 50
4x = 200
x = 200/4 = 50.
Une bille pèse 50 grammes.