Respostas

  • Usuário do Brainly
2014-05-30T12:39:40-03:00
X/3-5=15  

X=3x5+15  

X=3x20 

X=60

Espero ter ajudado. 
2014-05-30T13:37:03-03:00
1/3x - 5 = 15
1/3x = 15 + 5
1/3x = 20
x = 20 ÷ 1/3
x = 20 × 3
x = 60