when a number x is divided by 9 the reminder is 6 when the same number is divided by 21 the reminder is 12 if x lies between 250 and 450 then what is the sum of all possible values of x.
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Step-by-step explanation:
x/9=Q+6
x/21=Q +12
x/9-x/21=6-12
(7x-3x)/63=-6
4x=-6×63
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