How do you write this in a expression?please answer quick (take away a number n from 24)

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

An architect builds a model of a park in the shape of a rectangle. the model is 40.64 centimeters long and 66.04 centimeters wide. one inch equals 2.54 centimeters. use the ratio table to find the ratio of the length to the sum of the length and width in inches and in simplest form. length 40.64 width 66.04 a. 8: 21 b. 13: 21 c. 21: 13 d. 21: 8

What is the answer to this problem? ignore the work. what is the correct answer?