1) 1-1/4=(4-1)/4=3/4
2) 2-3/7=(14-3)/7=11/7= 1 4/7
3) 4-5/12=(48-5)/12=43/12= 3 7/12
4) 6-7/15= (90-7)/15=83/15= 5 8/15
5) 8-3/7= (56-3)/7=53/7= 7 5/7
6) 10-1/10= (100-1)/10= 99/10= 9 9/10
7) 12-3/5= (60-3)/5= 57/5= 11 2/5
8) 16-5/7=(112-5)/7=107/7= 15 2/7
х-7/12=3/4
х=3/4+7/12 3/4+7/12=(9+7)/12=16/12=4/3=1 1/3
х=1 1/3
х-1/6=1/9
х=1/9+1/6 1/9+1/6=(2+3)/18=5/18
х=5/18
х-3/5=3/8
х=3/8+3/5 3/8+3/5=(15+24)/40=39/40
х=39/40
х-5/24=11/12
х=11/12+5/24 11/12+5/24=(22+5)/24=27/24=1 3/24=1 1/8
х=1 1/8
у-2/7=1/3
у=1/3+2/7 1/3+2/7=(7+6)/21=13/21
у=13/21
х-5/6=7/9
х=7/9+5/6 7/9+5/6=(14+15)/18=29/18=1 11/18
х=1 11/18
у-3/8=5/32
у=5/32+3/8 5/32+3/8=(5+12)/32=17/32
у=17/32
у-2/5=1/2
у=1/2+2/5 1/2+2/5=(5+4)/10=9/10
у=9/10