4.7+8.1=4.2y-3.2y-8.4

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Solution for 4.7+8.1=4.2y-3.2y-8.4 equation: 


Simplifying
4.7 + 8.1 = 4.2y + -3.2y + -8.4

Combine like terms: 4.7 + 8.1 = 12.8
12.8 = 4.2y + -3.2y + -8.4

Reorder the terms:
12.8 = -8.4 + 4.2y + -3.2y

Combine like terms: 4.2y + -3.2y = 1y
12.8 = -8.4 + 1y

Solving
12.8 = -8.4 + 1y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
12.8 + -1y = -8.4 + 1y + -1y

Combine like terms: 1y + -1y = 0
12.8 + -1y = -8.4 + 0
12.8 + -1y = -8.4

Add '-12.8' to each side of the equation.
12.8 + -12.8 + -1y = -8.4 + -12.8

Combine like terms: 12.8 + -12.8 = 0.0
0.0 + -1y = -8.4 + -12.8
-1y = -8.4 + -12.8

Combine like terms: -8.4 + -12.8 = -21.2
-1y = -21.2

Divide each side by '-1'.
y = 21.2

Simplifying
y = 21.2

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