Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now?

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anonymous · Answer

10 + Tim= Coach

Coach-3= 2*(Tim-3)

anonymous · Answer

Two equations two unknowns solve for Tim... You can do this by isolating coach then substituting in to cancel. 

This is a system of equations and you are trying to find a solution if there is one.

anonymous · Answer

if x represents the total number of bags a person checks and each person checks more than two bags, the equation below can be used to determine C, the total fee for all the bags.

20 + 25 + 50(x - 2) = C

Arianna paid a total of $145 to check all her bags on a flight. How many bags did she check in all?

anonymous · Answer

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