Answer:
The required equation:
.
Total weight of the basket of apples = 20 pounds.
Explanation:
Let the weight of basket of apples be p pounds.
We have been that Liang ate 3 pounds of apples, before she had time to make the pies. So the amount of apples left after eating pounds will be:
.
We are also told that after eating 3 pounds of apples, there are 17 pounds of apples left to make pies. We can represent this information as:

Therefore, the equation
represents the number of apples left to make pies.
Let us solve for p by adding 3 to both sides of our equation.


Therefore, the total weight of the basket of apples was 20 pounds.