Respuesta :

Answer:

R=-6

Step-by-step explanation:

6 +18r =20r -18 -4r

            -4r

6 +18r =16r -18

    -16r =-16r

 6 +2r =-18

-6       = -6

       2r=-12

Divide by 2 on both sides and you get -6

ACCESS MORE