How do you find the sum or difference of #(4x+2y-6z)+(5y-2z+7z)+(-9z-2x-3y)#?

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Answer 1 · 2017-03-06T19:51:51

See the entire solution process below:

First, remove all of the terms from parenthesis. Be careful to handle the signs of the individual terms correctly:

#4x + 2y - 6z + 5y - 2z + 7z - 9z - 2x - 3y#

Next, group like terms together:

#4x - 2x + 2y + 5y - 3y - 6z - 2z + 7z - 9z#

Now, combine like terms:

#(4 - 2)x + (2 + 5 - 3)y + (-6 - 2 + 7 - 9)z#

#2x + 4y - 10z#