Given data:
It is given that a+b=c and b=5.
Now according to substitution property if x and y are equal then x can be placed instead of y anywhere.
So, if
![\begin{gathered} a+b=c,\text{ and b=5} \\ \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/vmffpiozt6t6n6qd6wvze6q0gt0qvxrvjo.png)
then we can write 5 instead of b in th equation by substitution property.
![a+5=c](https://img.qammunity.org/2023/formulas/mathematics/college/nzb6s99vkw29hawto5ewkx9iscv9spzc9q.png)
So, the correct answer is B) substituion