3x+12-0.8x=3.4-0.8-9.4

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Solution for 3x+12-0.8x=3.4-0.8-9.4 equation: 


Simplifying
3x + 12 + -0.8x = 3.4 + -0.8 + -9.4

Reorder the terms:
12 + 3x + -0.8x = 3.4 + -0.8 + -9.4

Combine like terms: 3x + -0.8x = 2.2x
12 + 2.2x = 3.4 + -0.8 + -9.4

Combine like terms: 3.4 + -0.8 = 2.6
12 + 2.2x = 2.6 + -9.4

Combine like terms: 2.6 + -9.4 = -6.8
12 + 2.2x = -6.8

Solving
12 + 2.2x = -6.8

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 2.2x = -6.8 + -12

Combine like terms: 12 + -12 = 0
0 + 2.2x = -6.8 + -12
2.2x = -6.8 + -12

Combine like terms: -6.8 + -12 = -18.8
2.2x = -18.8

Divide each side by '2.2'.
x = -8.545454545

Simplifying
x = -8.545454545

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