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Orice exercitiu incercuit ,

Orice Exercitiu Incercuit class=

Răspuns :

31.)   8/10X100=80%
32.)5+x=28
x=3
25..............100%
3.................y%
y=3x100/25=12%
33.)    100-(8/10x100)=20
30.)     6/24x100=25%
29.)     x+15x/100=690
115x/100=690
115x=690x100
x=600