one number is 3 times another number. if 15 is added to both the numbers, then one of the new numbers become twice that of the other new number. find the number
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a=3b
and
a+15=2(b+15)
3b+15=2b+30
b=15
so a=45
and
a+15=2(b+15)
3b+15=2b+30
b=15
so a=45
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