6.4=4-2y

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Solution for 6.4=4-2y equation: 


Simplifying
6.4 = 4 + -2y

Solving
6.4 = 4 + -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.
6.4 + 2y = 4 + -2y + 2y

Combine like terms: -2y + 2y = 0
6.4 + 2y = 4 + 0
6.4 + 2y = 4

Add '-6.4' to each side of the equation.
6.4 + -6.4 + 2y = 4 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + 2y = 4 + -6.4
2y = 4 + -6.4

Combine like terms: 4 + -6.4 = -2.4
2y = -2.4

Divide each side by '2'.
y = -1.2

Simplifying
y = -1.2

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