<span> а)</span>
<span>x-3целых 1/2=6,1</span>
<span>х-7/2=6,1</span>
<span>х=48/5</span>
<span>х=48/5:1</span>
<span>х=48/5</span>
<span>Ответ:48/5</span>
<span>б)</span>
<span><span>2,5х+6,3=7целых 1/3</span></span>
<span><span>2,5х=22/3-6,3</span></span>
<span><span>2,5х=31/30</span></span>
<span><span>х=31/30:2,5</span></span>
<span><span>х=31/75</span></span>
<span><span>Ответ:31/75</span></span>