7y + 8 = 57, then 2y =

y = 7;

2y = 14.

To find the value of 2y, we need to isolate the variable y by performing some algebraic operations.

Given the equation 7y + 8 = 57, we want to move the constant term 8 to the other side of the equation to isolate the y term.

Subtracting 8 from both sides of the equation:

7y + 8 - 8 = 57 - 8

This simplifies to:

7y = 49

Now, to solve for y, we need to get rid of the coefficient 7 in front of y. To do this, we divide both sides of the equation by 7:

(7y) / 7 = 49 / 7

Simplifying further:

y = 7

Now, to find 2y, we simply substitute the value we obtained for y into the expression 2y:

2y = 2 * 7

This gives us:

2y = 14

Therefore, the value of 2y is 14.