[14999-(784-129n)*2-177]:7+14=2018
[14999-(784-129n)*2-177]:7=2018-14
[14999-(784-129n)*2-177]:7=2004
14999-(784-129n)*2-177=2004*7
14999-(784-129n)*2-177=14028
14999-(784-129n)*2=14028+177
14999-(784-129n)*2=14205
14999-14205=(784-129n)*2
794=(784-129n)*2
794:2=784-129n
397=784-129n
129n=784-397
129n=387
n=387:129
n=3
