Accuplacer Practice Test

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If x=3, y=-4, and z=2, what is the value of 2x-y?

The correct answer is: 10

To find the value of $2x - y$ when $x = 3$ and $y = -4$, we start by substituting the given values into the expression. First, calculate $2x$: \[ 2x = 2(3) = 6 \] Next, substitute the value of $y$: \[ 2x - y = 6 - (-4) \] Subtracting a negative number is the same as adding its positive: \[ 6 - (-4) = 6 + 4 = 10 \] Thus, the value of $2x - y$ is 10. This confirms that the correct answer is indeed the one that corresponds to this calculation, which is 10.