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ex.7 plz. Dau coroana

Ex7 Plz Dau Coroana class=

Răspuns :

x=6
y=21
x+y=6+21=27
y-x=21-6=15
3/y=x/54=5/45
x=54*5:45
x=6
y= 3*54:6
y=27
x+y=6+27=33
y-c=27-6=21