7z-42=4z

Solution for 7z-42=4z equation:

Simplifying
7z + -42 = 4z

Reorder the terms:
-42 + 7z = 4z

Solving
-42 + 7z = 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
-42 + 7z + -4z = 4z + -4z

Combine like terms: 7z + -4z = 3z
-42 + 3z = 4z + -4z

Combine like terms: 4z + -4z = 0
-42 + 3z = 0

Add '42' to each side of the equation.
-42 + 42 + 3z = 0 + 42

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

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

Divide each side by '3'.
z = 14

Simplifying
z = 14