What is 1.99x10 to the power of 30 without a scientific notation

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

10 points? me . its important ‼️‼️

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?