If 3x+4y=60 and 6x-4y=12, what is the product of x and y?	Answers:
A) 80 B) 54 C) 54 D) 72 E) 12
Given 3x+4y=60 ---Eq 1   6x -4y =12 -- Eq 2   Sum both eqns we get 9X = 72 =&gt; X = 8   sum 6X in eq 2 =&gt; 48 - 4y = 12.   =&gt; Y = 9   Now XY = 8 * 9= 
<gadget id="calculator">8 * 9</gadget>
<output>72</output>
72   Option 72 is correct answer.
<result>D</result>
If 3x+4y=60 and 6x-4y=12, what is the product of x and y?