Can someone please help me? PLEASE ANSWER WITHIN 24 HOURS!!!!!!!!!!!!!!!!!

Question

Ok i am having trouble with this problem, i was hoping someone could help me, i have submitted it before and no one has answered. Here it is:

3/5k-7/10=1/2

We end up getting 45/14, which i know isn't right, could someone please help and explain the steps?

Answer 1

Hey there,

 

From what I see, the way it is presented may get me confused, but I will give it a try:

 

I believe the equation may be: 

 

3k/5 - 7/10 = 1/2

with that in mind, we will combine the terms.  To combine fractions, you need....a ..... common denominator.  And, for common denominators, you will use the LCM or Least Common Multiple.

 

The LCM for the numbers 5, 10, and 2 is ......  10!

 

so the equation becomes:

 

(3k *2 / 5 * 2) - 7/10 = (1*5 /2*5) or   6k/10 - 7/10 = 5/10

If you multiply every fraction by 10, you will get:

 

6k - 7 = 5

6k = 12

k = 2

So, if I am reading your equation correctly, 

k = 2

 

I hope this helped!