Решите уравнение 1) (1,8 + x) * 21 = 71,4 2)16*(4x-3,4 ) = 6,08 3) (x-1,25)*4,5=27

1) (1,8 + x) * 21 = 71,41,8+х=71,4:211,8+х=3,4х=3,4-1,8х=1,6Проверка:(1,8+1,6)*21=71,43,4*21=71,471,4=71,42)16*(4x-3,4 ) = 6,084х-3,4=6,08:164х-3,4=0,384х=0,38+3,44х=3,78х=3,78:4х=0,945Проверка:16*(4*0,945-3,4)=6,0816*(3,78-3,4)=6,0816*0,38=6,086,08=6,083) (x-1,25)*4,5=27х-1,25=27:4,5х-1,25=6х=6+1,25х=7,25Проверка:(7,25-1,25)*4,5=276*4,5=2727=27