2z+9=15

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Solution for 2z+9=15 equation: 


Simplifying
2z + 9 = 15

Reorder the terms:
9 + 2z = 15

Solving
9 + 2z = 15

Solving for variable 'z'.

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

Add '-9' to each side of the equation.
9 + -9 + 2z = 15 + -9

Combine like terms: 9 + -9 = 0
0 + 2z = 15 + -9
2z = 15 + -9

Combine like terms: 15 + -9 = 6
2z = 6

Divide each side by '2'.
z = 3

Simplifying
z = 3

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