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f(x)=5x+7

g(x)=2-3x

What does (f-g)(x)=?

Simplify your answer.

For somereason its not 2x+5

 Dec 5, 2015
 #1
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Simplify the following:
(5 x+7)-(2-3 x)

-(2-3 x) = 3 x-2:
3 x-2+5 x+7

Grouping like terms, 5 x+3 x-2+7 = (5 x+3 x)+(7-2):
(5 x+3 x)+(7-2)

5 x+3 x = 8 x:
8 x+(7-2)

7-2 = 5:
Answer: |   8x+5
 

 Dec 5, 2015

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