<em><span>(х-18,2)+3,8=15,6</span></em>
<em><span>х-18,2=15,6-3,8</span></em>
<em><span>х-18,2=11,8</span></em>
<em><span>х=11,8+18,2</span></em>
<em><span>х=30</span></em>
<span>Ответ:x=30</span>
<em><span>34,2-(17,9-y)=22</span></em>
<em><span>34,2-17,9+у=22
16.3+у=22
у=22-16,3</span></em>
<em><span> y=5.7</span></em>
<span>Ответ:y=5,7</span>