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Given that X / 3 = Y / 5 = Z / 7 is not equal to 0, find the value of X-Y + Z / y
Let X and Z be represented by y
x=3y/5,z=7y/5
Y / y = 1
Given x + y = 3, y + Z = 4, x + Z = 5, then x + y + Z equals ()
A. 6B. 8C. 10D. 12
From the meaning of the question: x + y = 3, ① y + Z = 4, ② x + Z = 5, ③ ① + ② + ③: 2x + 2Y + 2Z = 12, that is, x + y + Z = 5
If X-Y = 3, Y-Z = 5, then what is x-z equal to?
It's 8, X-Y + Y-Z = 3 + 5 = 8
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