<span> (10y+2*(7y-2)):5=(5*(4y+3)+3y):5</span>
<span>10y+14y-4/5=20y+15+3y/5</span>
<span>обе части *5</span>
<span><span>10y+14y-4-20y-3y-15=0</span></span>
<span><span>-y=19</span></span>
<span><span>y=-19</span></span>
<span>(12x-7*(x+4):7=(26-4x):7</span>
<span>12x-7x-28/7=26-4x/7</span>
<span>обе части умножаем на 7</span>
<span>12x-7x+4x=26+28</span>
<span>9x=54</span>
<span>x=6</span>
<span>(8*(3m-2)-13):4=(5*(12+3m)+28):4 </span>
<span>24m-16-13/4=60+15m+28/4</span>
<span>обе части *4</span>
<span>24m-15m=16+13+60+28</span>
<span>9m=117</span>
<span>m=13</span>