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!
Source(s): Im good at math!
Kiana
· 8 years ago
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· just now
5+9 is 14, not 12… So, 5x + 9x = 14x.
Ilya · 8 years ago
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· just now
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?
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