{(4224/24-125)/3+5X}-72+111=61
{(176-125)/3+5X}-72+111=61
(51/3+5X)-72+111=61
17+5X-72+111=61
5X=61-17+72-111
5X=5
X=5/5
X=1
3000-{492-[(X/3-271)-36}+1500}=1243
3000-{492-{[X/3-271-36+1500}}=1243
3000-{492-X/3-271-36+1500}=1243
3000-1685-X/3=1243
1315-X/3=1243
1315-1243=3X
72=3X
X=72/3
X=9