Question

4 (x+1)=12
2,5 (x-2)-1,5x=1
3,5x+8=2 (x+7)
6 (3x+2)-8=-2
Todas são perguntas separadas

Answer 1

4 (x+1)=12
4x+4=12
4x=12-4
4x=8
x=8/4
x=2


2,5 (x-2)-1,5x=1
2,5x-5-1,5x=1
2,5x-1,5=1+5
x=6


3,5x+8=2 (x+7)
3,5x=2x+14-8
3,5x-2x=14-8
1,5x=6
x=6/1,5
x=4


6 (3x+2)-8=-2
18x+12-8=-2
18x=-2-12+8
18x=-14+8
18x=-6
x=-6/14
x= -0,4285714286