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2014-11-04T09:57:14+02:00
A+b/2=18
a+b=36
a=2b
2b+b=36
3b=36
b=36:3
b=12

a=2*12
a=24
2014-11-04T09:57:54+02:00
(a+b):2=18 =>a+b=18x2 =>a+b=36
a=2b
2b+b=26 =>3b=36 =>b=36:3 =>b=12
a=2b =>a=12x2 =>a=24

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