if x and y are integers, what is the least positive number of 24 x + 21 y?	Choose the correct option:
A) 3  B) 5  C) 6  D) 8  E) 9
<gadget id="calculator">24 - 21</gadget>
<output>3</output>

<result>A</result>
if x and y are integers, what is the least positive number of 24 x + 21 y?
subtract(24, 21)
"24 x + 21 y = 3 ( 8 x + 7 y ) which will be a minimum positive number when 8 x + 7 y = 1 . 8 ( 1 ) + 7 ( - 1 ) = 1 then 3 ( 8 x + 7 y ) can have a minimum positive value of 3 . the answer is a ."