1) х-28 = 58+37
х = 58+37 +28
х= 123
2) 8х = 80*12
8х = 960
х= 960/8
х= 120
3)х/28 = 300 -203
х/28 =97
х = 97*28
х = 2716
Примечание: не поняла, к чему в последнем задании 602?
<span> 3216:(5y-109)=16</span>
<span><span>(5y-109)=3216:16</span></span>
<span><span><span>5y-109=201</span></span></span>
<span><span><span>5у=201+109</span></span></span>
<span><span><span>5*у=310</span></span></span>
<span><span><span>у=310:5</span></span></span>
<span><span><span>у=62</span></span></span>
<span><span><span>
</span></span></span>
Х-7/9х=3 6/10
1-7/9=9/9-7/9=2/9
2/9х=3 6/10
х=3 6/10:2/9=36/10*9/2=18/10*9
х=162/10=16 2/10
По середине 5 1 и 9 2 и 8 3 и 7 4 и 6 и всё плюс 5 равно 15