7k + 4 is the simplified version
First add the two numbers together 35 and 55 you will than get 90 take that and divide it by the number 18
ANSWER
90÷18=5
Answer: 9 weeks
Step-by-step explanation: Subtract 126(final amount) by 45(starting amount) and you will get 81(amount of money made of # of weeks). Divide 81 by 9(money made per week) and you will get 9. (# of weeks)
