If x, y, and z are positive integers, and 2x = 5y = 7z, then the least possible value of x + y + z is	Choose the correct choice:
A) 15
B) 28
C) 37
D) 42
E) 59
Take LCM of 2,5 and 7 = 70   Now 2x = 70 =&gt; x =35   5y = 70 =&gt; y = 14   7z = 70 =&gt; z =10   35+14+10= 
<gadget id="calculator">35+14+10</gadget>
<output>59</output>
59.   Option 59.
<result>E</result>
If x, y, and z are positive integers, and 2x = 5y = 7z, then the least possible value of x + y + z is