subtract 2 (10b+4)-(b-2)
To subtract the expressions 2(10b+4) from (b-2), we need to distribute the 2 to the terms within the parentheses first.
So, 2(10b+4) becomes 20b + 8.
Now, let's subtract (20b + 8) from (b-2):
(b-2) - (20b + 8)
= b - 2 - 20b - 8
= -19b - 10
Thus, the expression (b-2) - 2(10b+4) simplifies to -19b - 10.