Question

What is the value of this expression when b=5? 6(2b-4)

Answer 1

6(2b-4)=?

when b=5

=6(5*2-4)

=6(10-4)

=60-24

=36

Answer 2

Answer:

36

Step-by-step explanation:

The given expression is :   6·(2·b - 4) ..............(1)

So, using distributive law in the given expression which is denoted as :

a·(b + c) = a·b + a·c .................Using this in (1)

⇒ 6·(2·b - 4) = 6·(2·b) - 6·4

                    = 12·b - 24

For b = 5,     = 12·5 - 24

                    = 60 - 24

                    = 36

Thus the value of given expression for b = 5 is 36