у: 3 1/5 = 4 1/2: 2 1/4
2 1/4у=4 1/2*3 1/5
9/4у=9/2*16/5
9/4у=72/5
У=72/5:9/4=72/5*4/9
У=32/5=6 2/5
1/2 х: 5 = 16: 0,8
1/2х*0,8=16*5
0,4х=80
Х=80:0,4
Х=2000
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у: 3 1/5 = 4 1/2: 2 1/4
2 1/4у=4 1/2*3 1/5
9/4у=9/2*16/5
9/4у=72/5
У=72/5:9/4=72/5*4/9
У=32/5=6 2/5
1/2 х: 5 = 16: 0,8
1/2х*0,8=16*5
0,4х=80
Х=80:0,4
Х=2000