20=11-4y

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Solution for 20=11-4y equation:


Simplifying
20 = 11 + -4y

Solving
20 = 11 + -4y

Solving for variable 'y'.

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

Add '4y' to each side of the equation.
20 + 4y = 11 + -4y + 4y

Combine like terms: -4y + 4y = 0
20 + 4y = 11 + 0
20 + 4y = 11

Add '-20' to each side of the equation.
20 + -20 + 4y = 11 + -20

Combine like terms: 20 + -20 = 0
0 + 4y = 11 + -20
4y = 11 + -20

Combine like terms: 11 + -20 = -9
4y = -9

Divide each side by '4'.
y = -2.25

Simplifying
y = -2.25

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