Respuesta :

devishri1977

Answer:

x = 5.5

Step-by-step explanation:

PM = MR

4x - 12 = -2x + 21         {add 2x to both the sides}

4x - 12 + 2x = -2x + 2x + 21

6x - 12 = 21         {Add 12 to both sides}

6x - 12 + 12 = 21 + 12

            6x  = 33

              x = 33/6

x = 5.5

Gitartha

Step-by-step explanation:

here,

4x-12 = -2x+21

4x+2x = 21+12

6x = 33

x = 33/6