<span>10k+2*(7k-2)=5*(4k+3)+3k</span>
<span>10k+14k-4=20k+15+3k</span>
<span>24k-4=23k+15</span>
<span>24k-23k=15+4</span>
<span>k=19;</span>
<span>Проверка:</span>
<span>10*19+2(7*19-2)=5(4*19+3)+3*19</span>
10*19+14*19-4=20*19+15+3*19
24*19-4=23*19+15
452=452.