one number is twice another number.if 15 is subtracted from both the numbers,then one of the new number become thrice that of the other new number.find the number.
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15 is subtracted from both the numbers,the one of the new numbers become trice that of new number.
a - 15 = 3(b - 15)
a - 15 = 3b - 45
a = 3b - 45 + 15
a = 3b - 30
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