Respostas

2014-04-11T19:40:31-03:00
14x +8x-x+99 = 2x-5x+8
21x-2x+5x = 8-99
24x = -91
x = -91/24
1 5 1
2014-04-11T19:46:17-03:00

fácil:14x+8x-x+99=2x-5x+8
14x+8x-x+99-5x-8=0
22x-x+91-5x=0
17x-x+91-5x=0
18x--5x+91=0
13x+91=0
x=91÷13
X=7
1 5 1