Question

17+81:9-1•2•[(a:7+14:7+2)2-4+2•2]+32-3•8=6+56:8+5

Answer 1

17+81:9-1•2•[(a:7+14:7+2)2-4+2•2]+32-3•8=6+56:8+5
17+9-2×[(a:7+2+2)×2-4+4]+32-24 = 6+7+5
26-2×[(a:7+4)×2]+8 = 18
26-2×[(a:7+4)×2] = 18-8
26-2×[(a:7+4)×2] = 10
2×[(a:7+4)×2] = 26-10
2×[(a:7+4)×2] = 16
(a:7+4)×2 = 16:2
(a:7+4)×2 = 8
a:7+4 = 8:2
a:7+4 = 4
a:7 = 4-4
a:7 = 0
a = 0