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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