Question

уравнение 1 шестая игрик + 5 двенадцатый игрик равно 8,4
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Answer 1

Ответ:

Пошаговое объяснение:

$frac{1}{6} *y + frac{5}{12} *y = 8.4\frac{2}{12} *y + frac{5}{12} *y = 8.4\y*(frac{2}{12} + frac{5}{12}) = 8.4\y*frac{7}{12} = 8.4\y*frac{7}{12} = 8frac{4}{10}\y*frac{7}{12} = 8frac{2}{5}\y = 8frac{2}{5}:frac{7}{12}\y = 8frac{2}{5}*frac{12}{7}\y = frac{8*5+2}{5}*frac{12}{7}\y = frac{42}{5}*frac{12}{7}\y = frac{42}{5}*frac{12}{7}\y = frac{504}{35}\y = frac{72}{5}\y = 14frac{2}{5}\y = 14.4$