Réponses

2013-05-22T18:10:31+02:00
Salut !

4(x+5)-(1/3)(6x-3)=x-10
4x+20-(2x-1)=x-10
4x+20-2x+1=x-10
2x+21=x-10
x=-31

-(4/3)+(-(1/2)x+3)=3((1/4)x-(1/3))
-(4/3)-(1/2)+3=(3/4)x-1
-(1/2)x-(3/4)x=-4+(4/3)
-(5/4)x=-(8/3)
x=(32/15)

(2x+5)(x-7)-3=2x²-7
2x²-7x+5x-35-3=2x²-7
2x²-2x-38=2x²-7
-2x=31