Question

387-{625-[527+(437-a)-461]}=1

Answer 1

387-{625-[527+(437-a)-461]}=1
625-[527+(437-a)-461]=387-1
527+(437-a)-461=625-386
(437-a)-461=527- 239
437-a= 288
a=437-288
a=149
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Answer 2

387-{625-[527+(437-a)-461]}=1
625-[527+(437-a)-461]=387-1
625-[527+(437-a)-461]=386
527+(437-a)-461=625-386
527+(437-a)-461=239
527+(437-a)=239+461
527+(437-a)=700
437-a=700-527
437-a=173
a=437-173
a=264