5/10 =  n/6
How do you solve this?  You first must think about what the relationship is between the 5 and the 10.     I'm going to "assume" you already know the 5/10 is the same as 1/2.  You already know that   5*2 = 10.  
What number has the same relationship to 6 that 10 has to 5?  10 is twice as much as 5....6 is twice as much as3.  
3/6 = 1/2      OOH    5/10 = 1/2, too!  
You can also, as mentioned about, cross-multiply.  
5/10    *   n/6      (5 * 6,   10 * n)    30/10n    divide both by 10 (gets 'n' alone) 3 = n  
Prove it:   Put "3" in the unknown place    5/10 = 3/6     This is true.          

3 months ago. Rating: 3
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5/10 = x/6  >    5             x                     1            x

                        ------  =  ---------    or,    ------  =  ------- 

                           10            6                     2            6  

Cross multiply:                     30       10x             6            2x

Divide: Get x to itself.          -----  =  -------  or, ------  =  --------

                                                 10         10             2             2

x = 3

Check answer:  5/10 = 3/6      or,      1/2  =  3/6

                               1/2 = 1/2                  1/2 =  1/2

 

 

3 months ago. Rating: 3
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5/10=x/6 10x=30, cross multiply,  x=3.

3 months ago. Rating: 3
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