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Mathematics 22 Online
OpenStudy (anonymous):

WILL GIVE MEDAL AND WILL FAN!!! Solve. Express the solution in simplest form. http://static.k12.com/eli/ecollege/543/6_29448/2_30727_2_29450/b0f0ead74948683cdb0d44cf4717b5488f489500/media/7fbda63042fb78919de36a2f385236dc7d840e6a/mathml_56fcadf95c7b6779f9e469e1d5a555ad5231b7ce_1.gif x = _____

OpenStudy (anonymous):

does that really say \(\frac{2}{1}\) on the right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

but i know that it's equal to 2

OpenStudy (anonymous):

hmm most human beings call that number \(2\)

OpenStudy (mathstudent55):

Since this is written like a proportion, you can start by cross multiplying.

OpenStudy (anonymous):

it's problem for proportions

OpenStudy (anonymous):

\[\frac{8x-2}{9}=2\iff 8x-2=9\times 2\]

OpenStudy (anonymous):

i.e. \[8x-2=18\] solve in two steps a) add 2 b) divide by 8

OpenStudy (mathstudent55):

\(\dfrac{8x - 2}{9} = \dfrac{2}{1} \) \((8x - 2) \times 1 = 9 \times 2\) \(8x - 2 = 18\) Now follow satellite73 above.

OpenStudy (anonymous):

Thank You @satellite73

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