Répondre :
bjr
x+7=-2
x = -2 - 7
x = -9
-5x+3=27
-5x = 27 - 3
-5x = 24
x = -24/5
4x+7=15
4x = 15 - 7
4x = 8
x = 8/4 = 2
-x+1=0
-x = -1
x = 1
2(x-7)+5=15
2*x + 2*(-7) + 5 = 15
2x - 14 + 5 = 15
2x - 9 = 15
2x = 15 +9
x = 24/2 = 12
ET 3x=-12
x = -12/3 = -4
Bonjour,
x+7=-2 <=> x=-7-2
<=> x=-9
-5x+3=27 <=> -5x=27-3
<=> x=24/5
4x+7=15 <=> 4x=15-7
<=> x=8/4
<=> x=2
-x+1=0 <=> x=1
2(x-7)+5=15 <=> 2x-14+5=15
<=> 2x=15-5+14
<=> 2x=24
<=> x=24/2
<=> x=12
3x=-12 <=> x=-12/3
<=> x=--4