y+3.9=8

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Solution for y+3.9=8 equation: 


Simplifying
y + 3.9 = 8

Reorder the terms:
3.9 + y = 8

Solving
3.9 + y = 8

Solving for variable 'y'.

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

Add '-3.9' to each side of the equation.
3.9 + -3.9 + y = 8 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + y = 8 + -3.9
y = 8 + -3.9

Combine like terms: 8 + -3.9 = 4.1
y = 4.1

Simplifying
y = 4.1

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