27=7-2y

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Solution for 27=7-2y equation:


Simplifying
27 = 7 + -2y

Solving
27 = 7 + -2y

Solving for variable 'y'.

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

Add '2y' to each side of the equation.
27 + 2y = 7 + -2y + 2y

Combine like terms: -2y + 2y = 0
27 + 2y = 7 + 0
27 + 2y = 7

Add '-27' to each side of the equation.
27 + -27 + 2y = 7 + -27

Combine like terms: 27 + -27 = 0
0 + 2y = 7 + -27
2y = 7 + -27

Combine like terms: 7 + -27 = -20
2y = -20

Divide each side by '2'.
y = -10

Simplifying
y = -10

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