решаем пропорции
1) х=4*36/9
х=16
2) 5/12=25/х
х=12*25/5
х=60
3)
х/8=21/56
х= 8*21/56
х=3
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2)х=60
3)х=3
4)х=4
решаем пропорции
1) х=4*36/9
х=16
2) 5/12=25/х
х=12*25/5
х=60
3)
х/8=21/56
х= 8*21/56
х=3