9+6z-2=9z+21-5z

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Solution for 9+6z-2=9z+21-5z equation:


Simplifying
9 + 6z + -2 = 9z + 21 + -5z

Reorder the terms:
9 + -2 + 6z = 9z + 21 + -5z

Combine like terms: 9 + -2 = 7
7 + 6z = 9z + 21 + -5z

Reorder the terms:
7 + 6z = 21 + 9z + -5z

Combine like terms: 9z + -5z = 4z
7 + 6z = 21 + 4z

Solving
7 + 6z = 21 + 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
7 + 6z + -4z = 21 + 4z + -4z

Combine like terms: 6z + -4z = 2z
7 + 2z = 21 + 4z + -4z

Combine like terms: 4z + -4z = 0
7 + 2z = 21 + 0
7 + 2z = 21

Add '-7' to each side of the equation.
7 + -7 + 2z = 21 + -7

Combine like terms: 7 + -7 = 0
0 + 2z = 21 + -7
2z = 21 + -7

Combine like terms: 21 + -7 = 14
2z = 14

Divide each side by '2'.
z = 7

Simplifying
z = 7

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