Answer:
b = 9
Explanation:
Follow the order of operations to solve this problem. We can distribute the 4 to get 4b - 8. 4b and 8b are like terms, so we can add them together. Currently, we have:
12b - 8 = 100
Add 8 on both sides to get 12b = 108. Now, divide 12 on both sides to get b = 9.