Question

If a+b=5 and 3a+2b=20,then (3a+b)will be :

A) 20 B) 15 C) 25 D) 30

Answer 1

Answer:

I hope (3a+b) then will be 25

Answer 2

Step-by-step explanation:

let (a+b=5) be equation 1

let (3a+2b=20) be equation 2

multiplying equation 1 by 3 and subtracting,

we got,

b=-5

and a=10

then

3a+b=3(10)-5

= 30-5

= 25

ans= 25