9-(-1-3y)=4+y-(3-y)

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Solution for 9-(-1-3y)=4+y-(3-y) equation: 


Simplifying
9 + -1(-1 + -3y) = 4 + y + -1(3 + -1y)
9 + (-1 * -1 + -3y * -1) = 4 + y + -1(3 + -1y)
9 + (1 + 3y) = 4 + y + -1(3 + -1y)

Combine like terms: 9 + 1 = 10
10 + 3y = 4 + y + -1(3 + -1y)
10 + 3y = 4 + y + (3 * -1 + -1y * -1)
10 + 3y = 4 + y + (-3 + 1y)

Reorder the terms:
10 + 3y = 4 + -3 + y + 1y

Combine like terms: 4 + -3 = 1
10 + 3y = 1 + y + 1y

Combine like terms: y + 1y = 2y
10 + 3y = 1 + 2y

Solving
10 + 3y = 1 + 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.
10 + 3y + -2y = 1 + 2y + -2y

Combine like terms: 3y + -2y = 1y
10 + 1y = 1 + 2y + -2y

Combine like terms: 2y + -2y = 0
10 + 1y = 1 + 0
10 + 1y = 1

Add '-10' to each side of the equation.
10 + -10 + 1y = 1 + -10

Combine like terms: 10 + -10 = 0
0 + 1y = 1 + -10
1y = 1 + -10

Combine like terms: 1 + -10 = -9
1y = -9

Divide each side by '1'.
y = -9

Simplifying
y = -9

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