Question

I need help, please and thank you

Answer 1

Answer:

See below ↓

Step-by-step explanation:

Problem

• $\frac{5x}{x+7} + \frac{7}{x}$

Work

• $\frac{5x(x)+7(x+7)}{x(x+7)}$
• $\frac{5x^{2} +7x+49}{x(x+7)}$
• 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

• $\frac{5x^{2} +7x+49}{x(x+7)}$