-9y-4.2=13.8

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Solution for -9y-4.2=13.8 equation: 


Simplifying
-9y + -4.2 = 13.8

Reorder the terms:
-4.2 + -9y = 13.8

Solving
-4.2 + -9y = 13.8

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 + -9y = 13.8 + 4.2

Combine like terms: -4.2 + 4.2 = 0.0
0.0 + -9y = 13.8 + 4.2
-9y = 13.8 + 4.2

Combine like terms: 13.8 + 4.2 = 18
-9y = 18

Divide each side by '-9'.
y = -2

Simplifying
y = -2

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