.8+1.2y-3y=9

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Solution for .8+1.2y-3y=9 equation: 


Simplifying
0.8 + 1.2y + -3y = 9

Combine like terms: 1.2y + -3y = -1.8y
0.8 + -1.8y = 9

Solving
0.8 + -1.8y = 9

Solving for variable 'y'.

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

Add '-0.8' to each side of the equation.
0.8 + -0.8 + -1.8y = 9 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -1.8y = 9 + -0.8
-1.8y = 9 + -0.8

Combine like terms: 9 + -0.8 = 8.2
-1.8y = 8.2

Divide each side by '-1.8'.
y = -4.555555556

Simplifying
y = -4.555555556

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