20=4-(y+9)

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Solution for 20=4-(y+9) equation:


Simplifying
20 = 4 + -1(y + 9)

Reorder the terms:
20 = 4 + -1(9 + y)
20 = 4 + (9 * -1 + y * -1)
20 = 4 + (-9 + -1y)

Combine like terms: 4 + -9 = -5
20 = -5 + -1y

Solving
20 = -5 + -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.
20 + y = -5 + -1y + y

Combine like terms: -1y + y = 0
20 + y = -5 + 0
20 + y = -5

Add '-20' to each side of the equation.
20 + -20 + y = -5 + -20

Combine like terms: 20 + -20 = 0
0 + y = -5 + -20
y = -5 + -20

Combine like terms: -5 + -20 = -25
y = -25

Simplifying
y = -25

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