Question 88872
Questions:

(3x-4)+(7x+9)
(4x-9y)-(-6x+8y)
-5x-9x-2x


Answers.


(3x-4)+(7x+9)


Rewrite the expression by removing parenthesis as follows...


3x - 4 + 7x + 9


Now collect the like terms together.....


3x + 7x - 4 + 9


10x + 5 , which is the simplified form.

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(4x-9y)-(-6x+8y)


==> 4x - 9y + 6x - 8y

Now collect the like terms together...


==> 4x + 6x - 9y - 8y


==> 10x - 17y

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-5x - 9x - 2x = -14x - 2x = -16x

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Hope you understood.


Regards.


Praseena.