Choose all of the following which lie on the graph of x + 2y - z = 8.
A)
(5, 2, 13)
B)
(1, 2, 0)
C)
(6, -2, -6)
D)
(-3, -1, -8)
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Answered by altavistard
As an example, let's look at B: x=1, y=2, z=0. Evaluating the left side of the given expression in x, y and z, we get x + 2y - z = 8 => 1 + 2(2) - 0 = 5, which does not equal 8. So B is not a solution. Please check out the other possible solutions. Which set {x, y, z} makes the given equation true?