15z+-2z-17z=20

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Solution for 15z+-2z-17z=20 equation: 


Simplifying
15z + -2z + -17z = 20

Combine like terms: 15z + -2z = 13z
13z + -17z = 20

Combine like terms: 13z + -17z = -4z
-4z = 20

Solving
-4z = 20

Solving for variable 'z'.

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

Divide each side by '-4'.
z = -5

Simplifying
z = -5

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