Question

How do you solve `-5x-2=-107`?

Answer 1

`x=21`

Explanation:

`"Add 2 to both sides of the equation"`

`-5xcancel(-2)cancel(+2)=-107+2`

`rArr-5x=-105`

`"divide both sides by "-5`

`(cancel(-5) x)/cancel(-5)=(-105)/(-5)`

`rArrx=21`

`color(blue)"As a check"`

Substitute this value into the left side of the equation and if equal to the right side then it is the solution.

`"left "=(-5xx21)-2=-105-2=-107=" right"`

`rArrx=21" is the solution"`