Réponse:
a) 3/2= x b) -11/3=x
Explications étape par étape:
a) (x-5)×-3x+1/(x-5)=1×(x-5)
-3x+1=x-5
-3+1+5=x-5+5
-3x+6=x
-3x+3x+6=x-3x
6/4=4x/4
6/4=x
3/2=x
b) (x+7)×3-x/(x+7)=2×(x+7)
3-x=2×x+2×7
3-x=2x+14
-14+3-x=2x+14-14
-14+3-x=2x
+x-14+3-x=2x+x
-14+3=3x
-11=3x
-11/3=x
