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2014-11-08T16:35:58+02:00
A+b=540⇒b=540-a
5a+b=600
5a+540-a=600
4a=600-540
4a=60
a=60:4
a=15

b=540-a=540-15=525

b=525

a+b=540⇒b=540-a
5a+b=600
5a+540-a=600
4a=600-540
4a=60
a=60:4
a=15

b=540-a=540-15=525

b=525