Anyone plz help me!!
In 2065 BS, the age of father was 3 times the age of his son. In 2080 BS, father will be 10 years more than twice of his son's age. Find the birth of son

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?