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Re: If 3x – 3y = 12z, what is the value of x [#permalink]
19 Nov 2011, 11:32

Using statement (1), we get an equation in x and y, which is insufficient to calculate the value of x without knowing the value of y.

Using statement (2), if 4z = 6 -y => 12z = 18 - 3y Putting this value of z in the given equation, we get 3x - 3y = 12z = 18-3y => x = 18/3 = 6. Sufficient.

Re: If 3x – 3y = 12z, what is the value of x [#permalink]
27 Jul 2014, 20:31

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