Answer:
9a+6b
Explanation:
The given expression is
![4a+7b+5a-b](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mm26pnnvta8wgezsmiod60ljz7tna1zjqu.png)
We need to find the simplified form of the given expression.
First of all we need to combined like terms to simplify the given equation.
On combining like terms we get
![(4a+5a)+(7b-b)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rsi2u5yu8aqvc8tzwpzgi3iww481ybspru.png)
On further simplification we get
![9a+6b](https://img.qammunity.org/2020/formulas/mathematics/middle-school/natreli8dlaebmb0683jxb5kseltlny8f5.png)
Therefore, the simplified form of the given expression is 9a+6b.