subtract 2 (10b + 4) - (b - 2)

To solve the given expression, let's apply the distributive property to remove the brackets:

2(10b + 4) - (b - 2)
= 2 * 10b + 2 * 4 - (b - 2)
= 20b + 8 - (b - 2)

Next, distribute the negative sign to the terms inside the brackets:

= 20b + 8 - b + 2

Combine the like terms:

= 20b - b + 8 + 2
= 19b + 10

Thus, the simplified expression is 19b + 10.