У+2/7=1/3
У=1/3-2/7
У=7/21-6/21=1/21
Х-1/6=7/9
Х=7/9+1/6
Х=14/18+3/18
Х=17/18
У-3/8=5/32
У=5/32+3/8
У=5/32+12/32
У=17/32
У+2/5=1/2
У=1/2-2/5
У=5/10-4/10
У=1/10
5/9+1/6+3/4=
20/36+6/36+27/36=
53/36=1 17/36
1/8+4/9+5/6=
9/72+32/72+60/72=
101/72=1 29/72
1/4+1/5-3/10=
5/20+4/20-6/20=
9/20-6/20=3/20
Пошаговое объяснение:
