5а+80а=85а
86d-76d=10b
309x+x=310x
23a+46a+54a+77a=(23+46+54+77) x49=200x49=9800
<span> 139к - 72к - 39= (139-72-39)x11=28x11=308</span>
<span>
</span>
<span><span>13х + 28х = 656</span></span>
<span><span>41x=656</span></span>
<span><span>x=656:41</span></span>
<span><span>x=16</span></span>
<span><span>
</span></span>
<span><span><span> 82у - 39у = 645</span></span></span>
<span><span><span>43Y=645</span></span></span>
<span><span><span>y=645:43</span></span></span>
<span><span><span>y=15</span></span></span>
<span><span><span>
</span></span></span>
<span><span><span><span>49к - к = 384</span></span></span></span>
<span><span><span><span>48k=384</span></span></span></span>
<span><span><span><span>k=384:48</span></span></span></span>
<span><span><span><span>k=8</span></span></span></span>
<span><span><span><span>
</span></span></span></span>
<span><span><span><span><span>103а- 5а= 1960</span></span></span></span></span>
<span><span><span><span><span>98a=1960</span></span></span></span></span>
<span><span><span><span><span>a=1960:98</span></span></span></span></span>
<span><span><span><span><span>a=20</span></span></span></span></span>
<span><span><span><span><span>
</span></span></span></span></span>
<span><span><span><span>
</span></span></span></span>