tolong d bntu y kaka pakai cara! Terimakasih. no.24

19 = (10 x 4) + (6 x X)
--------------------------
6 + 4
19 = 40 + 6x
----------
10
19 x 10 = 40 + 6x
190 - 40 = 6x
150 = 6x
150 / 6 = x
25 = x

Bingung? tanya di komentar

19 = (6(x) + 10(4))/(6+4)
19 = (6x + 40)/10
190 = 6x + 40
190 - 40 = 6x
150 = 6x
x = 150/6
x = 25

Jawaban : D