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Select all the expressions that are equivalent to -2(5x - 1) + 7(5x - 1) - 3(-5x + 1)

A. -2(5x - 1) + 7(5x - 1) - 37-5x-1)
B. (5x-1) (2 + 7-3)
C. (5x-1) (-2+ 7 + 3)
D. 40x - 8
E 10x + 2​

1 Answer

12 votes

Answer:

D. 40x - 8

C. (5x-1)(-2+7+3)

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-2(5x - 1) + 7(5x - 1) - 3(-5x + 1)

= -10x + 2 + 35x - 7 +15x - 3

= -10x - 35x +15x + 2 - 7 - 3

= 40x - 8

D. is correct.

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(5x-1)(-2 + 7 + 3)

= -10x + 2 + 35x - 7 +15x - 3

= 10x - 35x +15x + 2 - 7 - 3

= 40x -8

which is as same as the answer choice D. and the answer you get from solving the -2(5x - 1) + 7(5x - 1) - 3(-5x + 1), so

C. is correct, too

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There seems to be a typo in answer choice A. so I cannot determine if A is also correct or not...

User Tim Andersen
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