How many positive integer solutions does the equation 2x+5y = 100 have?
Choose one:  A) 50  B) 33  C) 16  D) 35  E) 10
formula: (constant)/(lcm of two nos)   =100/(2*5)= 
<gadget id="calculator">100/(2*5)</gadget>
<output>10</output>
10   ANSW10R:10
<result>E</result>
How many positive integer solutions does the equation 2x+5y = 100 have?