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Sagot :

a) 3x + 2 = 0
3x = -2
x = -2/3
b) - 7 x - 5 =0
- 7 x = 5
x = - 5/7
c) 18 x = 0
x = 0
d) 1/2 x - 7 = 0
1/2 x = 7
x = 7 * 2
x = 14
e) - 3/7x + 4/5 = 0
- 3 /7 x = - 4/5
x = - 4/5 *  -7/3
x = 28/15
f) 3 (x-2) - 7(x+1) =0


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