4.2x+31.1=3.9-10.9x

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Solution for 4.2x+31.1=3.9-10.9x equation: 


Simplifying
4.2x + 31.1 = 3.9 + -10.9x

Reorder the terms:
31.1 + 4.2x = 3.9 + -10.9x

Solving
31.1 + 4.2x = 3.9 + -10.9x

Solving for variable 'x'.

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

Add '10.9x' to each side of the equation.
31.1 + 4.2x + 10.9x = 3.9 + -10.9x + 10.9x

Combine like terms: 4.2x + 10.9x = 15.1x
31.1 + 15.1x = 3.9 + -10.9x + 10.9x

Combine like terms: -10.9x + 10.9x = 0.0
31.1 + 15.1x = 3.9 + 0.0
31.1 + 15.1x = 3.9

Add '-31.1' to each side of the equation.
31.1 + -31.1 + 15.1x = 3.9 + -31.1

Combine like terms: 31.1 + -31.1 = 0.0
0.0 + 15.1x = 3.9 + -31.1
15.1x = 3.9 + -31.1

Combine like terms: 3.9 + -31.1 = -27.2
15.1x = -27.2

Divide each side by '15.1'.
x = -1.801324503

Simplifying
x = -1.801324503

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