Kak, tolong jawab soal saya ya please !!! Kalau benar aku janji deh jadikan sebagai jawaban terbaik !!!

A.
K = 3x/2 + 3x/2 + 2x
60 = 6x/2 + 2x
60 = 3x + 2x
60 = 5x
x = 60/5
x = 12

B.
K = (x + 1) + x + x + (x + 1) + (2x - 2)
30 = 6x 
x = 30/6
x = 5

C.
K = (x + 1) + 3x + (2x + 4) + x + 2x + (x - 1)
40 = 10x + 4
36 = 10x
x = 36/10
x = 3,6

D.
K = 6x + 2x + 2x + (x+6) + (x+6)
70 = 12x + 12
58 = 12x
x = 58/12
x = 29/6