John took all of his money out of his savings. he spent $50 on a radio and 3/5 of what remained on presents. half of what was left he put back in his checking accouny, and the remaining 35.00 he donated to charity. how much money did john originally have in his savings account?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?