Answer:
7b - 7
Step-by-step explanation:
You can use distributive property which is x (a + b) = x*a + x*b and x (a - b) = x*a - x*b. Therefore, the expression is 2*b + 2*4 + 5*b - 5*3 which is:
2b + 8 + 5b - 15, which is, if you combine like terms:
7b - 7
