Bonjour merci de m'aider 1) 6(x+3)-2(x-1)=0 2) 4+3x sur 5 = 7x-1 sur 8 ​

Réponse:

1)

6(x+3)-2(x-1)=0

6x+3*6-2x-2*(-1)=0

6x-2x+18+2=0

4x+20=0

4x= -20

x= -20/4 = -5

2)

(4+3x)/5 = (7x-1)/8

(4+3x)/5 - (7x-1)/8 = 0

(4+3x)×8/40 - (7x-1)*5/40 = 0

(32+24x)/40 - (35x-5)/40 =0

[(32+24x)-(35x-5)] /40 = 0

(37-11x)/40 = 0

37-11x = 40*0

37 = 11x

37/11 = x