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
x > 3x
- - -
-2 4 Can you show me how to simplify or solve for "x" in the following equations?

3(x+2)=-2(x+4)



2(x+1)=4-3(2x+1)



2(x+1)-3(x+7)=2



-3.6x+3.1=3(5.2-1.2x)


I would appreciate the help! Thank You =)