The equation is going to be 25+3r. I hope this helps.
Step 1. Find the Least Common Denominator (LCD) of 
Method 1: By Listing MultiplesList out all multiples of each denominator, and find the first common one.
Multiples of 14 :
14,......
Multiples of 7 : 7,
14, ......
Therefore, the LCD is 14.
Method 2: By Prime FactorsList all prime factors of each denominator, and find the
union of these primes.
Prime Factors of 14 : 2, 7
Prime Factors of 7 : 7
Therefore, the LCD is 
<span>
LCD = 14Step 2. Make the denominators the same as the LCD </span>

<span>
Step 3. </span><span>
Simplify. Denominators are now the same</span>
Step 4. Join the denominators
Step 5. Simplify <span>

</span>
Done!Decimal Form If Needed: <span>
-0.214286</span>
Hello! I can help you with this! So, you and 3 friends are 4 people. You split $536. To find the amount each of you got, Do division. 536/4 is 134. Each friend got $134 in the first month. You made 224 in 2 months. Let’s subtract to see how much more each of them got. 224 - 134 is 90. Now, multiply by 4 to find out how much profit was made. 90 * 4 is 360. The shop made $360 in the second month.