Решение уравнений:

1. (x - 34) + 15 = 61 $$x - 34 = 61 - 15$$ $$x - 34 = 46$$ $$x = 46 + 34$$ $$x = 80$$
2. (k - 36) - 43 = 72 $$k - 36 = 72 + 43$$ $$k - 36 = 115$$ $$k = 115 + 36$$ $$k = 151$$
3. (37 + d) – 58 = 49 $$37 + d = 49 + 58$$ $$37 + d = 107$$ $$d = 107 - 37$$ $$d = 70$$
4. 957 - (t + 336) = 428 $$t + 336 = 957 - 428$$ $$t + 336 = 529$$ $$t = 529 - 336$$ $$t = 193$$
5. 325 - (a - 617) = 219 $$a - 617 = 325 - 219$$ $$a - 617 = 106$$ $$a = 106 + 617$$ $$a = 723$$
6. 468 - (259 - c) = 382 $$259 - c = 468 - 382$$ $$259 - c = 86$$ $$c = 259 - 86$$ $$c = 173$$

Ответ: 1) x = 80; 2) k = 151; 3) d = 70; 4) t = 193; 5) a = 723; 6) c = 173.