4y-42=2y

Solution for 4y-42=2y equation:

Simplifying
4y + -42 = 2y

Reorder the terms:
-42 + 4y = 2y

Solving
-42 + 4y = 2y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-2y' to each side of the equation.
-42 + 4y + -2y = 2y + -2y

Combine like terms: 4y + -2y = 2y
-42 + 2y = 2y + -2y

Combine like terms: 2y + -2y = 0
-42 + 2y = 0

Add '42' to each side of the equation.
-42 + 42 + 2y = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 2y = 0 + 42
2y = 0 + 42

Combine like terms: 0 + 42 = 42
2y = 42

Divide each side by '2'.
y = 21

Simplifying
y = 21