Answer:
An equation:
![X-20=20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qlouvzzcy7hvh8ntis6rfo5ropoani018j.png)
Original number of strawberries are 40
Explanation:
Let X be the original number of strawberries.
As per the statement:
You eat 8 strawberries and your friend eats 12 strawberries from a bowl.
Total strawberries eat from a bowl = 8 + 12 = 20
Since, X is the original number of strawberries.
Remaining left strawberries in the bowl = X- 20
It is also given that: there are 20 strawberries left
⇒
![X-20=20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qlouvzzcy7hvh8ntis6rfo5ropoani018j.png)
We get an equation:
![X-20=20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/qlouvzzcy7hvh8ntis6rfo5ropoani018j.png)
Add 20 to both sides we get;
![X-20+20=20+20](https://img.qammunity.org/2020/formulas/mathematics/middle-school/zi987kfcna4dkj8l6totakabvkqmzrjjub.png)
Simplify:
![X=40](https://img.qammunity.org/2020/formulas/mathematics/middle-school/wjv7aednolrhbu35kxj3cs9uvaznrxgsi4.png)
Therefore, the original number of strawberries are 40