Respostas

2014-02-02T14:28:27-02:00
8x + 2x + 4 - 3 = 29
10x = 29 - 4 + 3
10x = 28
x = 28 ÷ 10
x = 2,8

2014-02-02T14:35:36-02:00
8x+2x+4-3=29 
10x+1=29
11x=29
x=29÷11 = 2,9