If x and y are integers, what is `x + y` ?
(1) `3^x = 81`
(2) `5^x = (25)/(5^y)`

If x, y and z are integers, is x even? (1) 10^(x)=(4^(y))(5^(z)) (2) 3^(x+5)=27^(y+1)

If x-y=3 and x+y=5 , what is the value of y?

If 3x+5y=15 and x-2y=10 , what is the value of 2x+7y ?

If 3^(x)=81 and 2^(x+y)=64 , then (x)/(y)=

If 17x -5y=8 and 14 x -7y =-7, what is the value of 3x + 2y ?

If x and y are two positive integers and x + y = 5 , then what is the probability that x equal 1 ?

{:(x = 2 y - 1),(y = 5 - 3x):}

The equation of straight line belonging to both the families of lines (x-y+1)+lambda_1(2x-y-2)=0 and (5x+3y-2)+lambda_2(3x-y-4)=0 where lambda_1, lambda_2 are arbitrary numbers is (A) 5x -2y -7=0 (B) 2x+ 5y - 7= 0 (C) 5x + 2y -7 =0 (D) 2x- 5y- 7= 0

(x)/(8)+(y)/(5)=(31)/(40) In the equation above, if x and y are positive integers, what is the value of x+y?