Question

If a / b = 7 / 3 then 7a + 9b / 7a - 9b = ? *

Answer 1

Given :

• a = 7
• b = 3

To find :

• 7a + 9b / 7a - 9b = ?

Solution :

Substituting a = 7 and b = 3, we get

➠ $\large\tt \frac{7 × 7 + 9 × 3}{7 × 7 - 9 × 3}$

➠ $\large\tt \frac{49 + 27}{49 - 27}$

➠ $\large\tt \frac{76}{22}$

➠ $\large\tt \frac{38}{11}$

Hence, answer is $\large\sf \frac{38}{11} \: or \: 3\frac{5}{11}$