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2014-05-10T17:06:51+03:00
A/b=3/2=k
a=3k
b=2k
1/2*(3k+2k)+30=450
1/2*5k=450-30
5k/2=520
5k=420*2
k=168
a=168*3=504
b=336
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2014-05-10T17:07:47+03:00
A=3b/2

1/2 * ( 3b/2 + b)+30=450  aducem la acelasi numitor in paranteza
1/2 * (3b+2b)/2 +30=450
5b/4 +30=450  aducem la acelasi numitor
5b+120=1800
5b=1800-120
5b=1680
b=336
a=3*336/2
a=3*168
a=504

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