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Номер три

10/а-3/4=1 1/410/а=5/4+3/410/а=8/410/а=4а=10/4а=2 2/4= 2 1/25,08+12х=29,7412х=29,74-5,0812х=24,66х=24,66:12х=2,0550,2х*62,5-3,25=4,250,2х*62,5=4,25+3,250,2х*62,5=7,50,2х=7,5:62,52х/10=75/10*10/6252х/10=3/252х=3/25*102х=30/25х=30/25:2х=30/25*1/2х=15/25=3/53,2*(1,5х-1)=44,84,8х-3,2=44,84,8х=44,8+3,24,8х=48х=48:4,8х=10