Réponse:
2ème partie :
1) 8x ÷2
2) a. 10-x
b. (6× (10-x))÷2
3)8x÷2 = (6×(10-x))÷2
4x = (6×10 – 6x)÷2
4x = (60 – 6x)÷2
4x = 30 – 3x
4x + 3x = 30
7x = 30
x = 30÷7
x = environ 4,286
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Réponse:
2ème partie :
1) 8x ÷2
2) a. 10-x
b. (6× (10-x))÷2
3)8x÷2 = (6×(10-x))÷2
4x = (6×10 – 6x)÷2
4x = (60 – 6x)÷2
4x = 30 – 3x
4x + 3x = 30
7x = 30
x = 30÷7
x = environ 4,286