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Ответ

Автор - 1401Tamara
342 - 0,8Х = 6
348 = 0,8Х
Х = 348:0,8 = 435

Ответ

Автор - patrik1114
342-0.8x=6
-0.8x=-342+6
-0.8x=-336
x=420

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