If -3x+2y=28 and 3x+6y=84, what is the product of x and y? Choose the correct choice from the following.
A) 264.  B) 428  C) 0  D) 462  E) 642
Given -3x+2y=28 ---Eq 1   3x + 6y =84 -- Eq 2   Sum both eqns we get 8Y = 112 =&gt; Y = 14   Sum 2Y in eq 1 =&gt; -3X - 28 = 28.   =&gt; X = 0   Now XY = 0 * 14= 
<gadget id="calculator">0 * 14</gadget>
<output>0</output>
0.   Option 0 is correct answer.
<result>C</result>
If -3x+2y=28 and 3x+6y=84, what is the product of x and y?