( x + 4 2/7 ) - 3 6/7 = 6 9 5/13 - ( 7 6/13 - y ) = 2 3/13 Плизззз
Х+42/7=6+3 6/7 х+42/7=9 6/7 х=9 6/7-4 2/7 х=5 4/7 5 4/7+4 2/7-3 6/7=6 6=6 76/13-у=95/13-23/13 76/13-у=72/13 у=76/13-72/13 у=4 95/13-(76/13-4)=23/13 95/13-72/13=23/13 23/13=23/13