5%=5\100 4%=4\100
система ур
5х+4у=46*100
4х+5у=44*100
х=1100-5у\4
5500-25у\4 + 4у = 4600
(25у-16у)\4=900
9у=900*4=3600
у=400
х=1100-5*400\4=1100-500=600
х=600
проверка
5*600\100 + 4 *400\100 = 46
30 + 16 = 46
46 = 46
4*600\100 + 5*400\100=44
24+20=44
44=44