3x+12-.8x=3.4-.8x-9.4

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Solution for 3x+12-.8x=3.4-.8x-9.4 equation:


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

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

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

Reorder the terms:
12 + 2.2x = 3.4 + -9.4 + -0.8x

Combine like terms: 3.4 + -9.4 = -6
12 + 2.2x = -6 + -0.8x

Solving
12 + 2.2x = -6 + -0.8x

Solving for variable 'x'.

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

Add '0.8x' to each side of the equation.
12 + 2.2x + 0.8x = -6 + -0.8x + 0.8x

Combine like terms: 2.2x + 0.8x = 3x
12 + 3x = -6 + -0.8x + 0.8x

Combine like terms: -0.8x + 0.8x = 0.0
12 + 3x = -6 + 0.0
12 + 3x = -6

Add '-12' to each side of the equation.
12 + -12 + 3x = -6 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = -6 + -12
3x = -6 + -12

Combine like terms: -6 + -12 = -18
3x = -18

Divide each side by '3'.
x = -6

Simplifying
x = -6

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