Hello there! :)
Explanation:
Solving One-Step Equations: Addition and Subtraction.
Addition property of equality is adding the same number to both sides of an equation does not change the equation.
![a+c=b+c](https://img.qammunity.org/2019/formulas/mathematics/middle-school/s48znr9dm6usrnt8hotdd9devpinwznu1t.png)
First, you add by 23.6 from both sides of an equation.
![d-23.6+23.6=24.9+23.6](https://img.qammunity.org/2019/formulas/mathematics/middle-school/r01azcdbwrhnyoxx7a0czhxzhlwe0c1ow0.png)
And then solve or simplify.
![24.9+23.6=48.5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/6tjjl3s7mjos9cud7tytnmmg9db8l9aotw.png)
Answer: →
and
![\boxed{B.}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/zmt7i4aysw0luactx5m4i6rzdxsse5f8x2.png)
Hope this helps!
Thanks!
-Charlie
:)