2z+2=21

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Solution for 2z+2=21 equation: 


Simplifying
2z + 2 = 21

Reorder the terms:
2 + 2z = 21

Solving
2 + 2z = 21

Solving for variable 'z'.

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

Add '-2' to each side of the equation.
2 + -2 + 2z = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 2z = 21 + -2
2z = 21 + -2

Combine like terms: 21 + -2 = 19
2z = 19

Divide each side by '2'.
z = 9.5

Simplifying
z = 9.5

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