# Solve, If a+b =5 and 3a+2b=20, then (3a+b)=?

**Answer: (4) 25**

**Solve–**

a + b = 5 ……………. (1)

3a + 2b = 20 ……………….(2)

Solve the equation (1) and (2)

a = 10 and b = – 5

Put the value of a and b in (3a + b)

3a + b = 3 x 10 + (-5)

30 – 5 = **25 Ans.**