СРОЧНО!!! 7,2y+7,5=21,06 6,7×(35,712:4,8)+3,36
7,2y+7,5=21,06
7,2у = 21,06 - 7,5
7,2у = 13,56
у = 13,56/7,2
у= 13 56/100 : 7 2/10 = 1356/100 : 72/10 = 1356/100 * 10/72 =13560/7200 =
=1 53/60
6,7×(35,712:4,8)+3,36 = 6,7 * 7,44 + 3,36 = 49,848 + 3,36 = 53,208