5y=4y-3.9

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Solution for 5y=4y-3.9 equation: 


Simplifying
5y = 4y + -3.9

Reorder the terms:
5y = -3.9 + 4y

Solving
5y = -3.9 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
5y + -4y = -3.9 + 4y + -4y

Combine like terms: 5y + -4y = 1y
1y = -3.9 + 4y + -4y

Combine like terms: 4y + -4y = 0
1y = -3.9 + 0
1y = -3.9

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

Simplifying
y = -3.9

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