18=-3+z

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Solution for 18=-3+z equation:


Simplifying
18 = -3 + z

Solving
18 = -3 + 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 + -1z = -3 + z + -1z

Combine like terms: z + -1z = 0
18 + -1z = -3 + 0
18 + -1z = -3

Add '-18' to each side of the equation.
18 + -18 + -1z = -3 + -18

Combine like terms: 18 + -18 = 0
0 + -1z = -3 + -18
-1z = -3 + -18

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

Divide each side by '-1'.
z = 21

Simplifying
z = 21

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