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5 : 4 = 60 : x
5 = 60
4 x
5 x = 4 . 60
5 x = 240
x = 240 : 5
48
B) 80 : 60 = 48 : x - 30
4 : 3 = 48 : x - 30
4 = 48
3 x- 30
4 x - 30 = 3 . 48
x - 30 = 3 . 48
4
x -30 = 42
x = 42 + 30 = 72
jadikan terbaik yaa :)
b. skala termo Y = 60 berarti perbandingan dengan termo C = 100 : 60 = 5 : 3.
jadi 50/5 = Y-30/3 (karena titik bekunya 30) 10/1 = Y-30/3 --> 30 = Y-30 --> Y = 60
maaf kalau ada yang salah..