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Sorinela1979owwed4
a fost răspuns

Afla numărul x din : 900-x-50+13+1227-280=1000

Răspuns :

-x=1000-900+50-13-1227+280
-x=150-1215+280
-x=-1215+430
x=775
Anonim1utilizator
x:900-x-50+13+1227-280=1000
x:900-x-50+13+1227=1000+280
x:900-x-50+13=1280-1227
x:900-x-50=53-13
x:900-x=40+50
x:900-x=90
x:2=990
x=990×2
x=1880

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