нужно решить 2 уравнения:
1) 17n - 11n - 2n = 511
2) 23a - 8a - 13a = 33
1) 17n - 11n - 2n = 511
2) 23a - 8a - 13a = 33
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4n=511
n=511:4
n=127.75
23a-8а-13а=33
2а=33
а=33:2
а=16.5
4n=511
n=127.75
2)23a-8a-13a=33
23a-21a=33
2a=33
a=16.5