If tom isxyears old, then Jack is2xyears old.

That means, last year Jack was2x-1years old, and so Tom was(x-1)years old

then according to the question last year jack was 15 years older than tom was:

so tom is 15 and jack is 30

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(2) I had to google up to find that toonie means a $2 coin

let there be x toonies and y quarters.. so let us write this equation in the form of cents:

..........(I)

x number of 200 cent coins(toonies) and y number of 25 cent coins (quarters) makes 3900 cents($39)

you are also given that there are 6 more toonies than quarters.. that is,

x = y+6 .... substitute x = y+6 in equation (I) you have:

find y and then x(the number of toonies)!!