If 2x + y = 7 and x + 2y = 5, then 7xy/3 =?
Choose the correct choice:
A) A) 1
B) B) 2
C) C) 7
D) D) 18/5
E) E) 4
2*(x+2y = 5) equals 2x+4y=10   2x+4y=10   - 2x + y= 7   = 3y=3   Therefore Y = 1   Plug and solve...   2x + 1 = 7   2x=6   x=3   (7*3*1)/3   = 21/3= 
<gadget id="calculator">21/3</gadget>
<output>7</output>
7   7
<result>C</result>
If 2x + y = 7 and x + 2y = 5, then 7xy/3 =?