Réponses

2013-12-09T19:50:02+01:00
2) A=(x+3)+(4x-5)=x+3+4x-5=5x-2

B=6-2t-(4t-8)=6-2t-4t+8=-6t+14

C=-(8a+3)-4a=-8a-3-4a=-12a-3

D=(3y+7)+(-5y+3)=3y+7-5y+3=-2y+10

E=5z-6-(7-2z)+3z=5z-6-7+2z+3z=10z-13

F=(3-4x)-(-2x+8)=3-4x+2x-8=-2x-5

3) (4x+3)-(x+5)=3x-2

7x-(3+4x)=3x-3

(3+4x)-7x=-3x+3

6x-3-(3x-6)=3x+3

-(4x+5)-(-x)=-3x-5

5x+3-(-3+5x)=6