exam Maths Puzzle Numerical Ability

jim is now three times as old as kathy.
Four years ago, jim was seven times as old as kathy then.
find their present ages.

PLEASE HELP ME SOLVE THIS!

and can you show work!

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exam Other Question

what is domain and range At 10:00 A.M., a car leaves a house at a rate of 60 mi/h. At the same time, another car leaves the same house at a rate of 50 mi/h in the opposite direction. At what time will the cars be 330 miles apart?