Equação do primeiro grau . a) 3x+2=x+8 ? b)5×+20=x+16 ? c)3x-1...

A) 3x+2=x+8
3x-x=8-2
2x=6
x=6/2
x=3

b)5x+20=x+16
5x-x=16-20
4x=-4
x=-4/4
x=-1

c)3x-10=2x-78
3x-2x=-78+10
x=-68

d)4x-3=33
4x=33+3
4x=36
x=36/4
x=9

e)4x+10=2x-4
4x-2x=-4-10
2x= -14
x=-14/2
x=-7

f)2x+50=x-2
2x-x=-2-50
x=-52​