2z-18=-21+z

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Solution for 2z-18=-21+z equation:


Simplifying
2z + -18 = -21 + z

Reorder the terms:
-18 + 2z = -21 + z

Solving
-18 + 2z = -21 + 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.
-18 + 2z + -1z = -21 + z + -1z

Combine like terms: 2z + -1z = 1z
-18 + 1z = -21 + z + -1z

Combine like terms: z + -1z = 0
-18 + 1z = -21 + 0
-18 + 1z = -21

Add '18' to each side of the equation.
-18 + 18 + 1z = -21 + 18

Combine like terms: -18 + 18 = 0
0 + 1z = -21 + 18
1z = -21 + 18

Combine like terms: -21 + 18 = -3
1z = -3

Divide each side by '1'.
z = -3

Simplifying
z = -3

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