-42=z-51

Solution for -42=z-51 equation:

Simplifying
-42 = z + -51

Reorder the terms:
-42 = -51 + z

Solving
-42 = -51 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
-42 + -1z = -51 + z + -1z

Combine like terms: z + -1z = 0
-42 + -1z = -51 + 0
-42 + -1z = -51

Add '42' to each side of the equation.
-42 + 42 + -1z = -51 + 42

Combine like terms: -42 + 42 = 0
0 + -1z = -51 + 42
-1z = -51 + 42

Combine like terms: -51 + 42 = -9
-1z = -9

Divide each side by '-1'.
z = 9

Simplifying
z = 9