If 2x+3y=34 and ((x + y)/y)=13/8,then find the value of 5y+7x.	Choose the correct choice from the following
A) 25	B) 55	C) 35	D) 75	E) 85
The given equations are:   2x+3y=34 …(i) and, ((x + y) /y)=13/8 =&gt; 8x+8y=13y =&gt; 8x-5y=0 …(ii)   Multiplying (i) by 5,(ii) by 3 and adding, we get : 34x=170 or x=5.   Putting x=5 in (i), we get: y=8.   =&gt; 5y+7x=((5*8)+(7*5))=40+35= 
<gadget id="calculator">40+35</gadget>
<output>75</output>
75   Answer is 75.
<result>D</result>
If 2x+3y=34 and ((x + y)/y)=13/8,then find the value of 5y+7x.