z+42=3z

Solution for z+42=3z equation:

Simplifying
z + 42 = 3z

Reorder the terms:
42 + z = 3z

Solving
42 + z = 3z

Solving for variable 'z'.

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

Add '-3z' to each side of the equation.
42 + z + -3z = 3z + -3z

Combine like terms: z + -3z = -2z
42 + -2z = 3z + -3z

Combine like terms: 3z + -3z = 0
42 + -2z = 0

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

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

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

Divide each side by '-2'.
z = 21

Simplifying
z = 21