Bonjour,
a. 2x+13=3x-14
2x - 3x = - 14 - 13
- x = - 27
x = 27
b. 10x+3=1
10x + 3 = 1
10x = 1 - 3
10x = - 2
x = -2/10
x = - 1/5
c. (4x+6)(3-7x)=0
Si ab = 0 alors a = 0 ou b = 0
Donc,
4x + 6 = 0 ou 3 - 7x = 0
4x = - 6 ou - 7x = - 3
x = -6/4 ou x = 3/7
x = - 3/2
Les solutions sont - 3/2 ; 3/7.
Bonne journée.
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Bonjour,
a. 2x+13=3x-14
2x - 3x = - 14 - 13
- x = - 27
x = 27
b. 10x+3=1
10x + 3 = 1
10x = 1 - 3
10x = - 2
x = -2/10
x = - 1/5
c. (4x+6)(3-7x)=0
Si ab = 0 alors a = 0 ou b = 0
Donc,
4x + 6 = 0 ou 3 - 7x = 0
4x = - 6 ou - 7x = - 3
x = -6/4 ou x = 3/7
x = - 3/2
Les solutions sont - 3/2 ; 3/7.
Bonne journée.