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Cp2 = 40%
Cp3 = 25%
Vr3 = 173,9 cm3
dr3 = 1,15 g/cm3
mr3 = 173,9 cm3 x 1,15g/cm3 = 200g
mr1 = x
mr2 = 200g - x
15%x + 40% (200-x) = 25% x 200
0,15x + 0,4(200-x) = 50
0,15x + 80 - 0,4x = 50
-0,25x = -30
x = 120
mr1 = 120g
mr2 = 200g-120g = 80g