Respostas

2014-08-27T09:24:53-03:00
27x + 43x= 40
70x= 40
X=40/70
X=4/7
1 4 1
2014-08-27T09:30:53-03:00
27x+43x=40
70x=40
x=40/70
x=0,57

27*0,57 + 43*0,57= 39,9