Question

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

Answer 1

Given expression: 6(2b - 4)

To find the value of 6(2b - 4) at b= 5, we need to substitute the b=5 in the expression, we get

6(2(5) - 4)

= 6(10 - 4)…[solve parentheses]

= 6(6)

6 * 6 = 36

=> 6(2(5) - 4) = 36

Therefore, the value of 6(2b - 4) is 36, when b=5.

Answer 2

`6(2b - 4)`

Expanding the terms,

`(6 * 2b) - (6 * 4) \\ = 12b - 24`

Plugging in our value b,

`b = 5 \\ 12b - 24 = 12(5) - 24 = 36`

So the answer is,

`36`