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Calculează :
[tex] \frac{x + 5}{2} = 15 - 2x[/tex]


Răspuns :

(x+5)/2=15-2x

(x+5)/2=(15-2x)/1

x+5=2(15-2x)

x+5=30-4x (aduni 4x)

5x+5=30 (scazi 5)

5x=25

x=25/5

x=5