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[tex] \frac{4x}{5} [/tex] = [tex] \frac{5}{25} [/tex] . x = ?

Răspuns :

[tex]\displaystyle \frac{4x}{5} = \frac{5}{25} \\ 4x \cdot 25=5 \cdot 5 \\ 100x=25 \\ x= \frac{25}{100} \\ x= \frac{1}{4} [/tex]