7z-20=1

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Solution for 7z-20=1 equation: 


Simplifying
7z + -20 = 1

Reorder the terms:
-20 + 7z = 1

Solving
-20 + 7z = 1

Solving for variable 'z'.

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

Add '20' to each side of the equation.
-20 + 20 + 7z = 1 + 20

Combine like terms: -20 + 20 = 0
0 + 7z = 1 + 20
7z = 1 + 20

Combine like terms: 1 + 20 = 21
7z = 21

Divide each side by '7'.
z = 3

Simplifying
z = 3

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