21-13z-7=9

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Solution for 21-13z-7=9 equation:


Simplifying
21 + -13z + -7 = 9

Reorder the terms:
21 + -7 + -13z = 9

Combine like terms: 21 + -7 = 14
14 + -13z = 9

Solving
14 + -13z = 9

Solving for variable 'z'.

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

Add '-14' to each side of the equation.
14 + -14 + -13z = 9 + -14

Combine like terms: 14 + -14 = 0
0 + -13z = 9 + -14
-13z = 9 + -14

Combine like terms: 9 + -14 = -5
-13z = -5

Divide each side by '-13'.
z = 0.3846153846

Simplifying
z = 0.3846153846

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