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28 supra 48 minus 9 supra 48 +a =1

Răspuns :

[tex] \frac{28}{48} - \frac{9}{48} + a = 1 [/tex]
[tex] \frac{19}{48} + a = 1 [/tex]
a= [tex] \frac{48}{48} - \frac{19}{48} = \frac{29}{48} [/tex]

Sper ca te-am ajutat :D !
Oriest