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Mathematics 18 Online
OpenStudy (anonymous):

Simplify -2[9 - (x + 7)]. -32 - x -4 - x -4 + 2x -32 + 2x

OpenStudy (anonymous):

@silenceforthedead

OpenStudy (mathstudent55):

First, start working on the inner parentheses. You need to distribute the negative sign by x + 7.

OpenStudy (mathstudent55):

A negative sign outside parentheses is the same as a -1 outside parentheses. Use the distributive property to multiply -1 by x + 7

OpenStudy (anonymous):

so its 7?

OpenStudy (mathstudent55):

No. This is how you do it.

OpenStudy (mathstudent55):

\(-2[9 - (x + 7)] \) First, distribute the negative outside the parentheses: \(=-2[9 - x - 7)]\) Now combine the 9 and the -7 inside the parentheses.

OpenStudy (mathstudent55):

\(= -2[2 - x]\) Now we distribute the -2: \(= -4 + 2x\) \(= 2x - 4\)

OpenStudy (anonymous):

thnx

OpenStudy (mathstudent55):

You're welcome.

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