Question

Me ajudem vale 10!!
3x-1=81
9x+1=1/27
0,75x=9/16
2x=64
100x+3=1/10
2-9.2x-8=0
2x+2 x+1 =12
3 2×+ 2.3x
3 x-2+3 x-1=84

Answer 1

3x-1=81
3x= 81+1
3x=82
x= 82÷3 (deixa em fração)

9x+1=1/27
x= - 26/243

0,75x=9/16
x= 3/4

2x=64
x= 32

100x+3=1/10
x= 29/1000