<span>а)(4у-2)*(-2у)=-8у в квадрате +4у</span>
<span><span>б)5а(а-2b)+10ab=5а в квадрате-10ав+10ав=5а в квадрате</span></span>
<span><span><span>а) 2bc-3c=с(2в-3)</span></span></span>
<span><span><span><span>б) 10у(в третьей степени)+2у=2у(5у в квадрате+1)</span></span></span></span>
<span><span><span><span>8х+5(2-х)=13</span></span></span></span>
<span><span><span><span>8х+10-5х=13</span></span></span></span>
<span><span><span><span>8х-5х=13-10</span></span></span></span>
<span><span><span><span>3х=3</span></span></span></span>
<span><span><span><span>х=1</span></span></span></span>