5 1/3 * 7 1/2 = 16/3 * 15/2 = 40 см длина 40*0,3=12 см высота
V=5 1/3 * 40 *12 = 16/3 * 40 * 12 = 2560 см3
3/4 * 16/15 + 16/15 * 5/2 - 11/8*16/15 = 16/15 * (3/4 + 5/2 - 11/8) = 16/15* ( 6/8 + 20/8 - 11/8) = 16/15 * 15/8 = 2
6х - 48 = 84 ;
6х = 84 + 48 ;
6х = 132 ;
х = 132÷6 ;
х = 22 .
12/17t=96/357
t=96/357:12/17
t=(96*17)/(357*12)=<em>8/21</em>