Question

How do you solve `(r+13)/12=1`?

Answer 1

`r=-1`

Explanation:

`"multiply both sides of the equation by 12 the"`
`"denominator of the fraction"`

`cancel(12)^1 xx(r+13)/cancel(12)^1=12xx1`

`rArrr+13=12`

`"subtract 13 from both sides"`

`rcancel(+13)cancel(-13)=12-13`

`rArrr=-1`

`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.

`(-1+13)/12=12/12=1=" right side"`

`rArrr=-1" is the solution"`