Answered

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I need help.. 

7k/8-3/4-5k/16=3/8

seven "k" over eight minus three fourths minus five "k" over sixteen equals three eighths

Sagot :

AL2006
This is exactly like the one with the 'n's that you posted yesterday.
I guess you didn't get enough help on that one to understand it.

7k/8 - 3/4 - 5k/16 = 3/8

3/4 is the same as 6/8.
Add it to each side of the equation:

7k/8         - 5k/16 = 9/8

Multiply each side by 16 :

14k - 5k = 18

Add up the 'k's on the left side:

9k = 18

From this point, you can proceed directly to the numerical value of 'k'
if you need it.

In your question, you said you need help, and I showed you how to
strip the problem down so that the only thing left is ' k = something '.
Giving you the answer is no help.  Nobody actually needs the answer.
since 16 is their least common multiple you can get rid of all of the fractions by multiplying each fraction by 16:

16(7k/8)-16(3/4)-16(5k/16)=16(3/8)
 
14k-12-5k=6
            9k=6+12
            9k=18
              k=18/9
              k=2

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