3 (x-7) -6x=-x 5 (x+4)+x=6 7- (2x+3)=9

3 (x-7) -6x=-x 5 (x+4)+x=6 7- (2x+3)=93 (x-7) -6x+x=0 5 (x+4)+x-6=0 7- (2x+3) -9=03 (x-7) -5x=0 (5x+20)+x-6=0 -2-2x-3=03x-21-5x=0 5x+20+x-6=0 -5-2x=0-2x-21=0 6x+14=0 -2x-5=0-2x=21 6x=-14 — (2x+5)=02x=-21 x=(-14): 6 (2x+5) (-1)=0x=(-21): 2 x=-⁷₃ 2x+5=0x=-10,5 2x=-5 x=(-5): 2 x=-2,5