Answer:
First find the total amount you need to pay.
Since you need $125 for each lesson and you want to take twelve lessons, multiply.
125 * 12 = 1500
Then you need 50 dollars more.
1500 + 50 = 1550
That is the total amount you need to pay for the class.
You have 700 saved up so subtract that from the prices to find the answer.
1550 - 700 = 850.
You need 850 more dollars to pay for the class in full.