Question

INECUTIA 1,3(8)x-1<1,25x
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Answer 1

Răspuns:

-10,4 sper că e bine

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Answer 2

Explicație pas cu pas:

$1,3(8)x - 1 < 1,25x \\ \dfrac{138 - 13}{90}x - \dfrac{125}{100}x < 1 \\ \Big(\dfrac{125}{90} - \dfrac{5}{4}\Big)x < 1 \\ \Big(\dfrac{^{2)} 25}{18} - \dfrac{^{9)} 5}{4}\Big)x < 1 \\ \dfrac{(50 - 45)x}{36} < 1 \iff \dfrac{5x}{36} < 1 \\ 5x < 36 \implies x < \frac{36}{5}$