Question

How do you solve `-2r-6+r=3`?

Answer 1

`r=-9`

Explanation:

`"collect terms in r on left side of equation and numeric"`
`"values on the right side"`

`rArr-r-6=3`

`"add 6 to both sides"`

`-rcancel(-6)cancel(+6)=3+6`

`rArr-r=9`

`"multiply both sides by "-1`

`rArrr=-9`

`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.

`(-2xx-9)-6-9=18-15=3`

`rArrr=-9" is the solution"`