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4(7+5x)=248+2x
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Răspuns :

[tex]\displaystyle 4(7+5x)=248+2x \\ 28+20x=248+2x \\ 20x-2x=248-28 \\ 18x=220 \\ x= \frac{220}{18} \Rightarrow x= \frac{110}{9} [/tex]