4=2-y

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Solution for 4=2-y equation: 


Simplifying
4 = 2 + -1y

Solving
4 = 2 + -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.
4 + y = 2 + -1y + y

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

Add '-4' to each side of the equation.
4 + -4 + y = 2 + -4

Combine like terms: 4 + -4 = 0
0 + y = 2 + -4
y = 2 + -4

Combine like terms: 2 + -4 = -2
y = -2

Simplifying
y = -2

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