Question

4икс -1 4/5 равно 5,4.

Answer 1

$4x - 1 \frac{4}{5} = 5.4 \\ \\ 4x - \frac{9}{5} = \frac{54}{10} \\ \\ 4x = \frac{54}{10} + \frac{9}{5} \\ \\ 4x = \frac{27}{5} + \frac{9}{5} \\ \\ 4x = \frac{36}{5} \\ \\ x = \frac{36}{5} \div 4 \\ \\ x = \frac{9}{5} \\ \\ x = 1 \frac{4}{5}$

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