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OpenStudy (thefluffmuncher):
Solve: 7/9=21/x A. 14 B. 27 C. 14/9 D. 3
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OpenStudy (mathlegend):
\[\frac{ 7 }{ 9 } * \frac{ a }{ b} = \frac{ 21 }{ x }\] What do you multiply 7 times to get 21?
OpenStudy (thefluffmuncher):
3
OpenStudy (mathlegend):
What you do to the top (numerator) you have to do to the bottom (denominator)... right? So multiply the bottom by 3 as well.
OpenStudy (thefluffmuncher):
thanks dude :D you are really a math legend
OpenStudy (mathlegend):
I try :)
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