Question

Qual a incognita da equacao x-1+12=7x-25

Answer 1

x - 1 + 12 = 7x - 25
25 - 1 + 12 = 7x - x
12 = 6x
12/6 = x
6 = x

Answer 2

7x-25=x-1+12
7x-x=-1+12+25
6x=-1+37
6x=36
x=36|6    ( 36 dividido por 6 )
x=6  
:)