solutia 1 : ms1 c1 = 10% md1 = 0,1ms1
solutia 2: ms2 c2 = 20% md2 = 0,2ms2
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ms final = ms1 + ms2 md = md1+md2
(c1ms1 + c2ms2)·100/(ms1+ms2) = c final
notam ms1/ms2 = r
(10r + 20)/(r+ 1) = c 10r + 20 = cr +c r(c-10) = 20 - c r = (20-c)/(c-10)
a) r = 5/5 = 1/1 ms1 = ms2
b) r = 8/2 = 4 ms1 = 4ms2
c) r = 2/8 = 1/4 ms2 = 4ms1
