54-(х-19)=38
х-19=54-38
х-19=16
х=19+16
х=35
<span>(2 7\9z + 3 1\3)* 3\5= 1\6z+6 1\2
(25/9z+10/3)*3/5=1/6z+13/2
5/3z+2=1/6z+13/2
11/6z=13/2-4/2
11z/6=9/2
22z=54
z=54/22=27/11=2 5/11
Ответ 2 5/11</span>
40:10=4см
280:10=28м
300:10=30дм
610:10=61мм
А(0,6) В(1,3) С(2,4) D(2,9)