4.2+0.5y=8.1

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Solution for 4.2+0.5y=8.1 equation: 


Simplifying
4.2 + 0.5y = 8.1

Solving
4.2 + 0.5y = 8.1

Solving for variable 'y'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 0.5y = 8.1 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 0.5y = 8.1 + -4.2
0.5y = 8.1 + -4.2

Combine like terms: 8.1 + -4.2 = 3.9
0.5y = 3.9

Divide each side by '0.5'.
y = 7.8

Simplifying
y = 7.8

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