If the ratio of y to x is equal to 3 and the sum of y and x is 80, what is the value of y?

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

If the average of x and y is 50, and the aveage of y and z is 80, what is the value of z-x ?

If 50% of x equal the sum of y and 20, then what is the value of x - 2y ?

If x/3=4 and x+y=32, what is the value of x-y?

If 3x+3y=1 , what is the value of x=y-6 ?

If the ratio of x to y is 25 times the ratio of y to x, then what is the ratio of x to y ?

If (x-3y)/(x)=7 , what is the value of (x)/(y) ?

If 2x-3y=7 and y=3 , then what is the value of x?

If x+y=5 ; x-y=3 then what is the value of x ?

When x is subtracted from 2y, the difference is equal to the average of x and y. What is the value of (x)/(y) ?