7,2*3,8+(3,24-2,1312):0,42

453x-0,1827y, если х=0,1;y=100

5,6:(x+1,6)=0,08

1) ...=27,36+1,1088÷0,42=27,36+2,64=302) ...=453×0,1-0,1827×100=45,3-18,27=27,033) 5,6÷(х+1,6)=0,08 х+1,6=5,6÷0,08 х+1,6=70 х=70-1,6 х=68,4Проверка:5,6÷(68,4+1,6)=5,6÷70=0,08