20-7y=1

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Solution for 20-7y=1 equation: 


Simplifying
20 + -7y = 1

Solving
20 + -7y = 1

Solving for variable 'y'.

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

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

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

Combine like terms: 1 + -20 = -19
-7y = -19

Divide each side by '-7'.
y = 2.714285714

Simplifying
y = 2.714285714

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