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# If x is equal to 1 more than the product of 3 and z, and y is equal to

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Re: If x is equal to 1 more than the product of 3 and z, and y is equal to [#permalink]
Is this really a level 600-700 question? Don't see how anyone can get tricked by it.
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Re: If x is equal to 1 more than the product of 3 and z, and y is equal to [#permalink]
Source: McGraw Hill GMAT

If x is equal to 1 more than the product of 3 and z, and y is equal to 1 lessthan the product of 2 and z, then 2x is how much greater than 3y when z is 4?

(A) 1
(B) 2
(C) 3
(D) 5
(E) 6

We can create the equations:

x = 1 + 3z

and

y = 2z - 1

When z is 4, x is 13 and y is 7.

So 2x - 3y = 26 - 21 = 5.

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Re: If x is equal to 1 more than the product of 3 and z, and y is equal to [#permalink]
x= 3z+1
y= 2z-1
2x-3y=?
2(3z+1)-3(2z-1)= 6z+2-6z+3= 5
Value of z wasn't even required in this case.