4-2y=-1

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Solution for 4-2y=-1 equation: 


Simplifying
4 + -2y = -1

Solving
4 + -2y = -1

Solving for variable 'y'.

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

Add '-4' to each side of the equation.
4 + -4 + -2y = -1 + -4

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

Combine like terms: -1 + -4 = -5
-2y = -5

Divide each side by '-2'.
y = 2.5

Simplifying
y = 2.5

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