Brian and christian started keeping track of their workouts. brian did 85 sit-ups first week and 90 sit-ups each week after that. christina did 65 sit-ups the first week and 90 sit-ups each week after that. how many sit-ups will each person have done in 5 weeks?

Brian will have done 445, and Christian will have done 425.

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

answer: 38.47 is your answer

step-by-step explanation: hope i you and who ever sees this answer have a great rest of your day : )