A)x/21=6.4/48 b) 1 1/7:x=0.8:14 c) 5x:20=1/2:12
A)x/21=6.4/48
b) 1 1/7:x=0.8:14
c) 5x:20=1/2:12
Ответ(ы) на вопрос:
x/21 = 6.4/48
48x = 6.4*21
x = 134,4/48
x = 2,8
1 1/7:x = 0.8:14
0.8x = 1 1/7 * 14
x = 16/0.8
x = 20
5x:20 = 1/2 : 12
60x = 1/2 * 20
x = 10/60
x = 1/6
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