What is the sum of 5x and 9x?

What is the sum of 5x and 9x?

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Mathematics

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santiago

What is the sum of 5x and 9x?


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Kiana


Best Answer: 
Finding the sum means to add. So when adding numbers that are like terms, or the same variable, you simply add the numbers like you would if the "x" was not there. So…
5x + 9x = 14x <—This is your answer!
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Im good at math!

Kiana

· 8 years ago

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  • Ilya

    5+9 is 14, not 12…
    So, 5x + 9x = 14x.

    Ilya
    · 8 years ago

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  • the QUALITY homosapien

    5x+9x= 12x

    the QUALITY homosapien
    · 8 years ago

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Polynomials

Elizabeth C.

asked • 06/14/18

What algebraic expression must be subtracted from the sum of 9x^2+4x-6 and 5x^3+2x^2-2x-5 to give 5x^3+6x^2+1x-16 as a result?

Nothing 

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7aa2cd26 7a4f 4eba b621 60971dbca7dc

David W.
answered • 06/14/18

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                             9x2      +         4x     –    6
            5x3    +      2×2     –          2x      –   5                                        –     
      ——————————————————-      
            5x3    +    11x2     +         2x      –   11                              [sum]
            5x3    +      6x2     +         1x      –   16                      [subtract]
     ——————————————————-
                             5x2      +         x       +     5

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David W.
answered • 06/14/18

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(9x+ 4x – 6) + (5x+ 2x2 – 2x – 5) = 5x+ 11x2 + 2x – 11
 
So, if, say 9 – 5 = 4, 9 – 4 = 5, right?
 
(5x3 + 11x2 + 2x – 11) – (5x+ 6x2 + x – 16) = 5x2 + x + 5

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