2+3z-9=20

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Solution for 2+3z-9=20 equation: 


Simplifying
2 + 3z + -9 = 20

Reorder the terms:
2 + -9 + 3z = 20

Combine like terms: 2 + -9 = -7
-7 + 3z = 20

Solving
-7 + 3z = 20

Solving for variable 'z'.

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

Add '7' to each side of the equation.
-7 + 7 + 3z = 20 + 7

Combine like terms: -7 + 7 = 0
0 + 3z = 20 + 7
3z = 20 + 7

Combine like terms: 20 + 7 = 27
3z = 27

Divide each side by '3'.
z = 9

Simplifying
z = 9

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