Answer:
D.) Jake has $90 and Mike has $120.Jake saves $9 per week and Mike saves $6 per week. How long will it be before Jake and Mike have the same amount of money?
Step-by-step explanation:
D is the correct answer because on the left side of the equation 90 is the constant and 9 depends on x, in this case the amount of weeks. On the right side of the equation 120 is the constant and 6 again depends on the x, weeks. Because there is an equal sign inbetween them you are trying to find when these two are the same.
In other words (Jake) would have started out with ($)90 with an additional ($)9 per every x(week) which is equal to (Mike) starting out with ($)120 with an additional ($)6 per every x(week).
