15.9+y=4.2

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Solution for 15.9+y=4.2 equation: 


Simplifying
15.9 + y = 4.2

Solving
15.9 + y = 4.2

Solving for variable 'y'.

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

Add '-15.9' to each side of the equation.
15.9 + -15.9 + y = 4.2 + -15.9

Combine like terms: 15.9 + -15.9 = 0.0
0.0 + y = 4.2 + -15.9
y = 4.2 + -15.9

Combine like terms: 4.2 + -15.9 = -11.7
y = -11.7

Simplifying
y = -11.7

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