17=20-y

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Solution for 17=20-y equation:


Simplifying
17 = 20 + -1y

Solving
17 = 20 + -1y

Solving for variable 'y'.

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

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

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

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

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

Combine like terms: 20 + -17 = 3
y = 3

Simplifying
y = 3

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