Автор - almaztilepberg

6 (7x-11)-13 (x-6)=14 (2x+1)

Ответ

Автор - vesker152133val
42х - 66 - 13х + 78 = 28х +14
29х + 12 = 28х + 14
29х - 28х = 14 - 12
х = 2

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