12-4y=(y+9)

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Solution for 12-4y=(y+9) equation:


Simplifying
12 + -4y = (y + 9)

Reorder the terms:
12 + -4y = (9 + y)

Remove parenthesis around (9 + y)
12 + -4y = 9 + y

Solving
12 + -4y = 9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
12 + -4y + -1y = 9 + y + -1y

Combine like terms: -4y + -1y = -5y
12 + -5y = 9 + y + -1y

Combine like terms: y + -1y = 0
12 + -5y = 9 + 0
12 + -5y = 9

Add '-12' to each side of the equation.
12 + -12 + -5y = 9 + -12

Combine like terms: 12 + -12 = 0
0 + -5y = 9 + -12
-5y = 9 + -12

Combine like terms: 9 + -12 = -3
-5y = -3

Divide each side by '-5'.
y = 0.6

Simplifying
y = 0.6

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