вот решение ......... ......
S=t×V
-64+32х+84-36х=50х+150-15+х
-4х+20=51х+135
-4х-51х=135-20
-55х=115
Дальше закончи
<u>|...........|...........|............|...........|...........|...........|...........|</u>
0 <u>24</u> 72
5/8 - 1 = 5/8 - 8/8 = - 3/8;
- 1/6 • 4.2 = - 1/6 • 42/10 = - 7/10;
- 7/10 - (- 3/8) = - 28/40 + 15/40 = - 13/40