Fifty students are trying to at least raise $12500 for a class trip. They have already raised $1250. How much should each student raise, on

Let  x  be the average amount that each person raises.

Since there are  50  students, the total amount that they raise will be the average amount for each times the number of students.    This becomes:  50x

Take this amount and add to it the amount that they have already earned:  50x + 1250.

Since you want to raise at least 12500, you have this equation:  50x + 1250  ≥  12500

50x + 1250  ≥  12500

Subtract 1250 from both sides:

--->   50x  ≥  11250

Divide both sides by 50:

--->   x  ≥  225

So, the average amount left to earn is at least $225.00.