Tolong jawab untuk hari senin

A.
a : b = q : p
16 : 20 = 24 : (x + 10)
16 (x + 10) = 20 x 24
16x + 160 = 480
16x = 480 - 160
16x = 320
x = 320/16 = 20

B.
a : b = q : p
18 : 15 = (x + 18) : 20
15 (x + 18) = 18 x 20
15x + 270 = 360
15x = 360 - 270
15x = 90
x = 90/15 = 6