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Rebecarebeca12345
a fost răspuns

Aflati nr x din egalitatea 54-{2x+[(x:2+12):5+24]:3}:2=13  Dau coroana  cine raspunde primul dar corect.

Răspuns :

Kenyaa
54-{2x+[(x:2+12):5+24]:3}:2=13
{2x+[(x:2+12):5+24]:3}:2=54-13=41/·2
2x+[(x:2+12):5+24]:3=82/-2x
[(x:2+12):5+24]:3=82-2x/·3
(x:2+12):5+24=246-6x/-24
(x:2+12):5=222-6x/·5
x:2+12=1110-30x/-12
x:2=1098-30x/·2
x=2196-60x⇒61x=2196/:61⇒x=36

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