If 3x + 7y =75 and 7x +3y =25 then the value of x+y is Share with your friends Share 1 Manbar Singh answered this The given equations are 3x + 7y = 75 .....17x + 3y = 25 ......2Adding 1 and 2, we get 10x + 10y = 75 + 25⇒10x + 10y = 100⇒x + y = 10 ......3If your question is to find the value of x + y, then the answer is above.But if you want to know the solution of the above equations then here is the complete solution.Subtracting 2 from 1, we get-4x + 4y = 50⇒-x + y = 252 ........4Adding 3 and 4, we get2y = 10 + 252 = 452⇒y = 454Now, from 3, we getx = 10 - 454 = -54So, x = -54 ; y = 454 is the solution. 4 View Full Answer Kshitij Barai answered this X+Y=13.PLESE THUMB UP -3
