Respostas

2014-03-05T13:29:03-03:00
5x + 2 = 2x + 23
5x-2x = 23-2
3x=21
x=21/3
1 5 1
2014-03-05T13:31:25-03:00
X igual a sete pois 5x+2=2x+23 . 5x-2x=23-2 . 3x=23-2 . 3x=21 . x=21/3 = 7
1 5 1