1) 18*105/45+306 = 1890/45+306 = 42+306=348
2) 348/29+75 =12+75 =87
3) 5*87-269 = 435-269 =166
4) 166/83 = 2
12-30-31-8=-57, 12+6-31-8=-21
-11-5-10,8-10+17=-19,8
2,4*y+3,8=3,1*y+4,71
3,8-4,71=3,1y-2,4y
-0,91=0,7y
y=-0,91/0,7
y=-1,3
<span>62538 28701570
</span><span>62538 28701600
</span><span>62538 28702000
</span><span>62538 28700000
</span><span>62538 29000000
62538 30000000
62538 00000000
62540 00000000
62500 00000000
63000 00000000
60000 00000000</span>
А = 17; 17 * 0,03 = 0,51 - 3\% от "а"
в= 5; 5 * 0,07 = 0,35 - 7\% от "в"
0,51 - 0,35 = 0,16