Question

4x − 2y − z, if x = 2, y = 3, and z = −10

Answer 1

What is the question?

Answer 2

Evaluate the following expression using the values given.

Answer 3

So just plug in your values for the letters.
x=2 so wherever you see an x put a 2 instead
y=3 so wherever you see a y put a 3 instead
z=-10 so wherever you see a z put a -10 instead
Then just do basic math.

4x-2y-z = 4(2) - 2(3) - (-10) = 8 - 6 + 10 = 8 - 16 = -8
Remember that a double negative is a positive, so -(-10) = 10.
And remember PEMDAS for which order to do your math: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. You had 8 - 6 + 10 so you Add the 6 + 10 first before Subtracting that from the 8. It's been a while since I've had to break out the word PEMDAS but I believe that's correct.