anonymous
  • anonymous
Solve the proportion 7/9=x/117 . What is the value of x?
Mathematics
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1371136104080:dw|
anonymous
  • anonymous
just multiply the 117 to the other side
johnweldon1993
  • johnweldon1993
Seeing as how 'x' is being divided by 117...you could multiply both sides of the equation by 117...this will cancel out that fraction on the right hand side and isolate 'x'

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anonymous
  • anonymous
so its 7/9 X 117 = x
anonymous
  • anonymous
or cross multiply
anonymous
  • anonymous
|dw:1371136182545:dw| That it?
anonymous
  • anonymous
so 1053 under 819.
anonymous
  • anonymous
then divide?
johnweldon1993
  • johnweldon1993
Not quite...you multiply both sides of the equation by 117/1 so it would be \[\frac{ 7 }{ 9 } \times \frac{ 117 }{ 1 } = x\]
johnweldon1993
  • johnweldon1993
And as @FriedRice is pointing out....another way to approach this would be cross multiplication \[\frac{ 7 }{ 9 } = \frac{ x }{ 117 }\] You cross multiply 7 times 117 = ...? 9 times 'x' = ...? you have 9x = 819 divide both sides by 9 to get x = ...?
anonymous
  • anonymous
ok first multiply the 117 with 7 and then multiply 9 with x then devide.
anonymous
  • anonymous
okay so it would be|dw:1371136437182:dw|
anonymous
  • anonymous
yes
anonymous
  • anonymous
the product that you get it the answer for x.
anonymous
  • anonymous
okayyy
anonymous
  • anonymous
so 91=x?
johnweldon1993
  • johnweldon1993
Yes x = 91
anonymous
  • anonymous
thanks :D
johnweldon1993
  • johnweldon1993
no problem!

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