tolong bantu kak................

a) [tex] \frac{8}{11} = \frac{12}{12 + c} [/tex]
    8(12 + c) = (11)(12)
     96 + 8c = 132
             8c = 36
               c = 4,5 m

b) [tex] \frac{15}{d}= \frac{8}{11} [/tex]
    (15)(11) = 8d
       165 = 8d
         d = 20,625 m
      165 = 8d
          d =