98. Упростите выражение и найдите его значение:
1) 7а + 15а при а= = 3;
4) 14y + 33y — 45у при у = 17:
2) 23b + 16b при b = 8;
3) 44х – 18х при х = 5;
6) 18n + 347 — 22n при п = 6.
5) 52т — 25т + 45т при т = 9;​
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