Question

Can someone help me solve this please! I need to find what N equals!

Answer 1

`(12-n)/(7) = - 1`
Multiply cross

`12-n = 7*(-1)`

`12-n = -7`
Number with incognito are to the left of the equality and numbers without incognito are to the right, remembering that when changing of side changes the signal.

`-n = -7-12`

`-n=-19` simplify by (-1)

`\boxed{n = 19}`

Confirm that the solution is correct:


`(12-n)/(7) = - 1`

`(12-19)/(7) = - 1`

`(-7)/(7) = - 1`

`\boxed{-1=-1}(TRUE)`

Answer:

`\boxed{n = 19}`

Answer 2

[ (12 - n)/7 ] = -1

12- n = -7

-n = -19

n = 19