M/1.8+2.05=9;
m:1,8=9-2,05;
m=6,95*1,8;
m=12,51
12/6=2.......................................................
1)94,5:6,5=14,5(кг)-масса бочки
Ответ:14,5 кг.
50400:12=<span>4200</span><span><span>
-24</span><span>
24</span><span>
<span>0
</span></span></span>31005:15=2067
-30
-100
90
-105
105
<span>223218:18= </span>124<span><span>
-43</span><span>
36</span><span>
-72</span><span>
72</span><span> <span>
0</span></span></span>
480640:16=30040
<span><span><span>-48
</span> 064<span>
-64</span><span>
0</span></span>
</span>
3:(18-х)=35
/- дробная черта
1/3×(18-х)=35
6-1/3х=35
1/3х= - 21 |×3
Х= 63