Question

x-1/7=16/28 qual é a resposta?

Answer 1

28(x-1)=7*16
28x-28=112
28x=112+28
28x=140
x=140/28
x=5

Answer 2

x/1 - 1/7 = 16/28
mmc = 28
28x - 4 = 16

28x = 16 + 4
28x = 20
x = 20/28 0U  5/7

PROVA
20/28 - 1/7 = ( 20 - 4)/28  = 16/28 *** OU  4/7  
5/7 - 1/7 = 4/7