Tolong di jawab ya kakak​

TW x VR = RS x VW + UV x RW

10 x (RW + 4) = 15 x 4 + 5 x RW

10RW + 40 = 60 + 5RW

10RW – 5RW = 60 – 40

5RW = 20

RW = 20 : 5

RW = 4 cm