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Subtraction of Algebraic Expressions

What should b...

Question

What should be added to 2x + 8y to get 8x - 9y ?

A

10x – y

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B

6x – y

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C

6x – 17y

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D

6x + 17y

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Solution

The correct option is C
6x – 17y

Here sum is 8x – 9y . So we have to take away 2x + 8y from this.

(8x – 9y) – ( 2x + 8y) = 8x – 9y – 2x – 8y

= 8x – 2x -9y -8y

= 6x – 17y

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