-y=3.9

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Solution for -y=3.9 equation: 


Simplifying
-1y = 3.9

Solving
-1y = 3.9

Solving for variable 'y'.

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

Divide each side by '-1'.
y = -3.9

Simplifying
y = -3.9

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