Question

срочно!!!!!!!!!!!!!!!!!!!!! Только 1 три вопроса остальные я сам

Answer 1

$42 div frac{7}{4} - 15.6 + frac{5}{3} = frac{151}{15}$
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$1.4x + 14 = 0.6x + 0.4 \ 0.8x = - 13.6 \ x = 17$
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$552 times frac{23}{24} = 529$