<span> 728-(72*8)=152</span>
<span><span>(728+72):8=100 </span></span>
<span><span><span> 728-(72:8)=719</span></span></span>
<span><span><span><span>728+(72:8)=737</span></span></span></span>
<span><span><span>
</span></span></span>
1 5/11 : (3/5х - 6/25) = 2 2/5,
3/5х - 6/25 = 1 5/11 : 2 2/5,
3/5х - 6/25 = 16/11 : 12/5,
3/5х - 6/25 = 16/11 * 5/12,
3/5х - 6/25 = 20/33,
3/5х = 20/33 + 6/25,
3/5х = 500/825 + 198/825,
3/5х = 698/825,
х = 698/825 : 3/5,
х = 698/825 * 5/3,
х = 698/495,
х = 1 203/495
(700-к)=24210:538
700-к=45
к=700-45
к=655