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Find 3x-y-3z if x=-2, y=1, z=-2
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Find 3x-y-3z if x=-2, y=1, z=-2

Find 3x-y-3z if x=-2, y=1, z=-2-example-1
User Madhuri
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2 Answers

3 votes
Substitute everything in first


3(-2)-1-3(-2)


Then simplify


-6-1+6 = -1


The answer is -1
User Danny Hurlburt
by
8.1k points
6 votes
3 x (-2) - 1 - 3 x (-2)
(Simplify by: Multiplying a positive and a negitive equals a negative:
(+) x (-) = (+))
Multiplying two negitives equals a positive:
(-) x (-) = (+) )
-3 x 2 - 1 + 3 x 2
(Eliminate the opposites)
Answer: -1
User Almog Cohen
by
8.1k points
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