20z+-z-11z+-7z=-9

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Solution for 20z+-z-11z+-7z=-9 equation: 


Simplifying
20z + -1z + -11z + -7z = -9

Combine like terms: 20z + -1z = 19z
19z + -11z + -7z = -9

Combine like terms: 19z + -11z = 8z
8z + -7z = -9

Combine like terms: 8z + -7z = 1z
1z = -9

Solving
1z = -9

Solving for variable 'z'.

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

Divide each side by '1'.
z = -9

Simplifying
z = -9

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