bonjour
a) x + 11
b ) x - 7
c ) 5 x
d ) - 3 x
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a) 2 x
b ) x /3
c ) x + 8
d ) 13 - x
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x
5 x
5 x + 9
5 x + 9 = 18
5 x = 18 - 9
5 x = 9
x = 9/5 = 1.8
5 x + 9 = 2 ( 5 x + 9)
5 x + 9 = 10 x + 18
5 x - 10 x = 18 - 9
- 5 x = 9
x = - 9/5 = - 1.8
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2 x + 5 = 14
2 x = 14 - 5
2 x = 9
x = 4.5
je suis 4.5
continue
