524:4+4×{36-32:16×[15+(24:x-20:5)×9]+7}=183
131+4×{36-2×[15+(24:x-4)×9]+7}=183
4×{36-2×[15+(24:x-4)×9]+7}=183-131
4×{36-2×[15+(24:x-4)×9]+7}=52
36-2×[15+(24:x-4)×9]+7=13
-2×[15+(24:x-4)×9]=13-7-36
-2×[15+(24:x-4)×9]=-30
2×[15+(24:x-4)×9]=30
15+(24:x-4)×9=15
(24:x-4)×9=15-15
(24:x-4)×9=0
24:x-4=0
24:x=4
x=6
