`3^x5^y=75,3^y5^x=45` Then the value of `3x+4y=`

If 3x+5y=9,5x+3y=7 then find the value of x-y .

If 4x-5y=37 and 3x-4y=25, then find the value of x-y.

(i) x+2y=-7 and 3x-2y=-1, then find the value of x. (ii) If x+y=8 and 4y-x=2, then find the value of y. (iii) If 3x+5y=9 and 5x+3y=7, then find the value of x+y. (iv) If 3x-y=11 and x-3y=17, then find the value of x-y.

If 3x+5y =9 and 5x+3y=7, then find the value of x+y.

If x=2 and y=5 find the values of : 3x-4y

If x-y =4 and xy=45 , then the value of (x^3 - y^3) is :

If x:y = 5:6 then the value of (3x + 4y)/(4x + 3y) will be