Jawabanmu

2014-08-26T10:22:03+07:00
5. nilai a = 20/15 = a/30
= 15a = 600
= a = 40
nilai b = 35/12 = 70/b
= 35b = 840
= b = 24
nilai c = c/60 = 20/35
= 35c = 1200
= c = 34,3
nilai d = 60/d = 35/47
= 35d = 2820
= d= 80,6


6. kurang tauuu


7. x/8 = 4/10
= 10x = 32
= x =3,2

ef = 10 + 3,2
= 13,2