Jawab yaa plisss...no 21 sampai 25 doang!!!

21. gk tau
22.270:12=x:16
22,5=x:16
x=360km
23. selisih uang ali dan ani 10.000
5-3=2
uang ali 5/2 x10000=25000
uang ani 3/2 x 10000=15000
24.a. 20 :5 = 4, 16:4= 4
b. 15:5=3, 8x3=24, 24-5=19
25.31500:7=58500:x
4500 = 58500:x
x = 58500:4500
x =13