10z+9=12z-6

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Solution for 10z+9=12z-6 equation:


Simplifying
10z + 9 = 12z + -6

Reorder the terms:
9 + 10z = 12z + -6

Reorder the terms:
9 + 10z = -6 + 12z

Solving
9 + 10z = -6 + 12z

Solving for variable 'z'.

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

Add '-12z' to each side of the equation.
9 + 10z + -12z = -6 + 12z + -12z

Combine like terms: 10z + -12z = -2z
9 + -2z = -6 + 12z + -12z

Combine like terms: 12z + -12z = 0
9 + -2z = -6 + 0
9 + -2z = -6

Add '-9' to each side of the equation.
9 + -9 + -2z = -6 + -9

Combine like terms: 9 + -9 = 0
0 + -2z = -6 + -9
-2z = -6 + -9

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

Divide each side by '-2'.
z = 7.5

Simplifying
z = 7.5

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