Question

3x+7y=75,5x-5y=25 x aur y ki value

Answer 1

x=16
y=9................
hope it helps

Answer 2

Heya User,

Given,

-->> 3x + 7y = 75
        5x - 5y = 25

-->> 3x + 7y = 75
        x   -   y  =  5    --> [ Dividing previous Eqn. by 5 ]

-->> 3x + 7y = 75
         7x - 7y = 35

Adding the two eqn.s :->
--> ( 3x + 7x ) + ( 7y - 7y ) = 110
=> ( 10x ) = 110
=> x = 110 / 10 = 11 ...

Further, x - y = 5 => y = x - 5 = 11 - 5 = 6 ||
Hence, ( x , y ) = ( 11 , 6 ) is the unique soln.