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2014-10-19T10:27:09+03:00
A=27+b
S=suma (a+b)
D-diferenta (a-b)

S:D=4,19
s=4d+19
a+b=4*(a-b)+19
a+b=4a-4b+19
27+b+b=4*(27+b)-4b+19
27+2b=108+4b-4b+19
27+2b=127
2b=127-27
2b=100
b=100:2
b=50

a=4*50+19
a=200+19
a=219
16 4 16
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