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April 19, 2014

April 19, 2014

Posted by **Andrew** on Monday, November 21, 2011 at 5:50am.

- maths -
**yussif**, Monday, November 21, 2011 at 6:24am1/2(2x+9)*10=85

multiply through by 1/2

(x+9/2)*10=85

10x+45=85

10x=85-45

10x=40

10x/10=40/10

x=4

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