-7.8-4y=4.2

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Solution for -7.8-4y=4.2 equation: 


Simplifying
-7.8 + -4y = 4.2

Solving
-7.8 + -4y = 4.2

Solving for variable 'y'.

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

Add '7.8' to each side of the equation.
-7.8 + 7.8 + -4y = 4.2 + 7.8

Combine like terms: -7.8 + 7.8 = 0.0
0.0 + -4y = 4.2 + 7.8
-4y = 4.2 + 7.8

Combine like terms: 4.2 + 7.8 = 12
-4y = 12

Divide each side by '-4'.
y = -3

Simplifying
y = -3

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