Respostas

2014-08-09T16:34:42-03:00
X + x/4 = 25
x/1 + x/4 = 25/1 (mmc 4 e 1: 4!)
4x + x = 100
5x = 100
x = 20

Quarta parte de 20: 5

20 + 5 = 25.

:)


4 4 4
2014-08-09T16:34:50-03:00
X + 1/4x = 25
4x + 1x = 100
5x = 100
x = 100/5
x = 20
1 5 1