Question

I need help, please and thank you

Answer 1

See below ↓

Explanation:

Problem

• 
  `(5x)/(x+7) + (7)/(x)`

Work

• 
  `(5x(x)+7(x+7))/(x(x+7))`
• 
  `(5x^(2) +7x+49)/(x(x+7))`
• The student's mistake was that instead of taking x(x + 7) as the LCM (Least Common Multiple), he took x + 7, which is not possible in this case

Solution

• 
  `(5x^(2) +7x+49)/(x(x+7))`