.Приведите подобные слагаемые:
а) 7х - 18х + 25х - 6x;
в) 1 la - 16h - 18а + 9ь;
б) –3b - 14b + 31b +7b;
г) -8k + 9р - 17k + 5k + 14
Помогите пожалуйста.!!!!.... ​
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