Respostas

2014-07-24T15:51:53-03:00
C- 
5x= 3x+98
5x-3x= 98
2x = 98
x=98/ 2
x= 49

3- x+10=28
x= 28 - 10
x= ana tem 18 anos 
2014-07-24T15:51:59-03:00
C) 5x=3x+98
5x-3x=98
2x=98
x=98÷2
x=49
3) x+10=28