Question

Ученикам 6 класса ВОПРОС

Answer 1

$\frac{64}{112} = \frac{2.8}{4x - 3.1} \\ \\ 64 \times (4x - 3.1) = 2.8 \times 112 \\ \\ 256x - 198.4 = 313.6 \\ \\ 256x = 313.6 + 198.4 \\ \\ 256x = 512 \\ \\ x = 512 \div 256 \\ \\ x = 2$

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