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Bubu2228
a fost răspuns

3/10 totul supra 2/5+1/5×10/3 = (1/4+7/5)×5/11 totul supra x AJUTOOOOR PRIMUL RASPUNS COROANA !!!!!

Răspuns :

ToaderIleana1
3/10/2/5+1/5•10/3=17/12(prima)
=3/10•5/2+1/5•10/3=>
=3/2•1/2+2/3=>
=3/4+2/3=>
=9/12+8/12=>
=17/12

(1/4+7/5)•5/11/x=>3/4x
=(5/20+28/20)•5/11•1/x=>
=33/20•5/11•1/x=>
=3/4•1/x=>
=3/4x

=>17/12=3/4x=
=68x=36=
=x=9/17


Rezultat final:9 supra 17