-13=z-4

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Solution for -13=z-4 equation:


Simplifying
-13 = z + -4

Reorder the terms:
-13 = -4 + z

Solving
-13 = -4 + 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.
-13 + -1z = -4 + z + -1z

Combine like terms: z + -1z = 0
-13 + -1z = -4 + 0
-13 + -1z = -4

Add '13' to each side of the equation.
-13 + 13 + -1z = -4 + 13

Combine like terms: -13 + 13 = 0
0 + -1z = -4 + 13
-1z = -4 + 13

Combine like terms: -4 + 13 = 9
-1z = 9

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

Simplifying
z = -9

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