Resposta :
A) x=7-3 => x=4
B)2.x=12 => x=12/2 => x=6
C)x+2=7 => x=7-2 => x=5
D)3x-4-1=0 => 3x=4+1 => 3x=5 => x=5/3
E)3x+1+6=2 => 3x=2-6-1 =>3x= -5 =>x=5/3
F)5X-5=3X-2 =>5X-3X= -2+5 => 2X=3 => X=3/2
G)ñ sei
H)ñ sei
B)2.x=12 => x=12/2 => x=6
C)x+2=7 => x=7-2 => x=5
D)3x-4-1=0 => 3x=4+1 => 3x=5 => x=5/3
E)3x+1+6=2 => 3x=2-6-1 =>3x= -5 =>x=5/3
F)5X-5=3X-2 =>5X-3X= -2+5 => 2X=3 => X=3/2
G)ñ sei
H)ñ sei