<span>а) 14х-(8х+3х)=1512 </span>
<span>14х-8х-3х=1512</span>
<span>3х=1512</span>
<span>х=1512:3</span>
<span>х=504</span>
<span><span> б) 11у-(5у-3у)=8136</span></span>
<span><span>11у-5у+3у=8136</span></span>
<span><span>9у=8136</span></span>
<span><span>у=8136:9</span></span>
<span><span>у=904</span></span>
<span><span>это лучшее решение</span></span>