Sagot :
Bonjour !
4 + 5 (x - 6) = 3 (x - 2)
<=> 4 + 5*x - 5*6 = 3*x - 3*2
<=> 4 + 5x - 30 = 3x - 6
<=> 5x - 26 = 3x - 6
<=> 5x - 26 - 3x = -6
<=> 2x - 26 = -6
<=> 2x = -6 + 26
<=> 2x = 20
<=> x = 20/2
<=> x = 10
S = {10}
Bonjour !
4 + 5 (x - 6) = 3 (x - 2)
<=> 4 + 5*x - 5*6 = 3*x - 3*2
<=> 4 + 5x - 30 = 3x - 6
<=> 5x - 26 = 3x - 6
<=> 5x - 26 - 3x = -6
<=> 2x - 26 = -6
<=> 2x = -6 + 26
<=> 2x = 20
<=> x = 20/2
<=> x = 10
S = {10}