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x-17×4=y×8=z:2:3=56:8

Răspuns :

x-17x4=56:8
x-17x4= 7
x-68=7
x=68+7
x=75

yx8=56:8
yx8=7
y=7/8
y=0,88

z:2:3=56:8
z:2:3=7
z:2=7x3
z:2=21
z=21x2
z=42