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x supra 2 = x supra 3 = x supra 5. x=+y+z = 20
x, y, z = ?


Răspuns :

x/2=y/3=z/5     y=3x/2   z=5x/2
x+y+z=20
x+3x/2+5x/2=20
2x+3x+5x=40
10x=40
x=4
y=3×4/2=6
z=5×4/2=10