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solve the equation

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by uptowngirl92 » Mon Jun 08, 2009 5:17 am
IF 2-x(1/x +2)=19-x,then x=?
(A) -3 (B) 3 (C) 4 (D) 5 (E) 9

[spoiler]the answer sheet contained a printing error so i dont know the answer for sure.could it by any chance be (e)?[/spoiler]

Okay so here is my querie:
Are we suppose to multiply (1/x+2) by only x or by 2-x?I assumed that because of an absence of bracket the term is to be multiplied by only x and hence the answer is (b).Please shed some light.
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by ketkoag » Mon Jun 08, 2009 9:29 am
from the equation above, i am getting x = -18
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by Osirus@VeritasPrep » Mon Jun 08, 2009 9:44 am
I'm assuming in the original equation you meant (1/(x+2))

If so the furthest I was able to simplify it was to

x^2 -16x - 34 = 0

Can't really factor it. Without knowing the typo its difficult to solve.
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by vasbli » Mon Jun 08, 2009 12:15 pm
2-x(1/x +2)=19-x

hence:

2-1-2x=19-x
1-2x+x=19
-x=18
x=-18

typo in the problem i assume....
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Re: solve the equation

by Musiq » Mon Jun 08, 2009 12:25 pm
uptowngirl92 wrote:IF 2-x(1/x +2)=19-x,then x=?
(A) -3 (B) 3 (C) 4 (D) 5 (E) 9

[spoiler]the answer sheet contained a printing error so i dont know the answer for sure.could it by any chance be (e)?[/spoiler]

Okay so here is my querie:
Are we suppose to multiply (1/x+2) by only x or by 2-x?I assumed that because of an absence of bracket the term is to be multiplied by only x and hence the answer is (b).Please shed some light.
The answer to your question is PEMDAS.

First Paranthesis....Multiplication by X and then the subtraction from 2.

So, we are supposed to MULTIPLY ONLY by X.
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