-4.2=-7.8-4y

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Solution for -4.2=-7.8-4y equation:


Simplifying
-4.2 = -7.8 + -4y

Solving
-4.2 = -7.8 + -4y

Solving for variable 'y'.

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

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

Combine like terms: -4y + 4y = 0
-4.2 + 4y = -7.8 + 0
-4.2 + 4y = -7.8

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

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

Combine like terms: -7.8 + 4.2 = -3.6
4y = -3.6

Divide each side by '4'.
y = -0.9

Simplifying
y = -0.9

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