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xover9 = 1/81

 May 22, 2014

Best Answer 

 #1
avatar+5478 
+22

So you have: x9 = 181

Cross-multiply the equation.

x*81 = 9*1

Simplify.

81x = 9

Divide both sides by 81

x = 9/81

Simplify the fraction.

x = 1/9

 May 22, 2014
 #1
avatar+5478 
+22
Best Answer

So you have: x9 = 181

Cross-multiply the equation.

x*81 = 9*1

Simplify.

81x = 9

Divide both sides by 81

x = 9/81

Simplify the fraction.

x = 1/9

kitty<3 May 22, 2014
 #2
avatar+118703 
+8

Hi Kitty,

You could have just multiplied both sides by 9 in the first place. You made it a little longer than necessary. 

 May 22, 2014

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