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Anonymous Anonymous
  • 25-05-2016
  • Mathematics
Answered

What is the value of the expression shown when x = –4?


6 + 3(x – 5) – (x + 3)


A.

–9


B.

4


C.

2


D.

–20

Verified Answer :

Petroniusz
Petroniusz Petroniusz
  • 25-05-2016

6 + 3(x - 5) - ( x + 3) =

it is best to simplify the expression
6 + 3x - 15 - x - 3 =

2x + 6 - 18 =

2x - 12 = 

Now we put the value of    x = -4

2 (-4) - 12 = -8 - 12 = -20

2. way

6 + 3
(x – 5) – (x + 3)

immediately we insert a value of x = -4

6 + 3 (-4 -5) - (-4 + 3) =

6 + 3
(-9) -(-1)=

6 - 27 +1 = -27 + 7 = -20

Aswer D : -20



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