20=-8z-9z

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Solution for 20=-8z-9z equation:


Simplifying
20 = -8z + -9z

Combine like terms: -8z + -9z = -17z
20 = -17z

Solving
20 = -17z

Solving for variable 'z'.

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

Add '17z' to each side of the equation.
20 + 17z = -17z + 17z

Combine like terms: -17z + 17z = 0
20 + 17z = 0

Add '-20' to each side of the equation.
20 + -20 + 17z = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 17z = 0 + -20
17z = 0 + -20

Combine like terms: 0 + -20 = -20
17z = -20

Divide each side by '17'.
z = -1.176470588

Simplifying
z = -1.176470588

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