Respostas

2014-06-23T17:59:05-03:00
4x-1= -2x+1
4x+2x=1+1
6x=2
x=2÷6
x=1/3

2x+15-1=1
2x=1-14
2x=-13
x=-13/2

5x-10=5(2x+1)-3
5x-10=10x+5-3
5x-10x=10+2
-5x=12
x=12/-5

2(x-1)=3(3x+6)
2x-2=9x+18
2x-9x=18+2
-7x=20
x=20/-7