Răspunsuri

2014-02-25T19:55:52+02:00
A÷b=5/7
(a+b)/2=29.4 ===> a+b=58.8 ===> a=58.8-b ====>
(58.8-b)/b=5/7====> 5b=7(58.8-b)====>5b=411.6-7b====>
12b=411.6====> b=34.3
a+34.3=58.8 ====> a=24.4