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A+B=360
A=80%B
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A=?
B=?
AM NEVOIE REPEDE VA ROOG!!


Răspuns :

a+b=360
a=80%b
a=80/100•b
a=8/10•b
a+b=360
8/10•b+b=360
8b/10+b=360
8b/10+10b/10=360
18b/10=360
1,8b=360
b=360:1,8b

b=
[tex]200[/tex]

a+b=360
b=200
a=8/10•b
a=8/10•200
a=8•20
a=
[tex]160[/tex]