12.9+x=3.8

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Solution for 12.9+x=3.8 equation: 


Simplifying
12.9 + x = 3.8

Solving
12.9 + x = 3.8

Solving for variable 'x'.

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

Add '-12.9' to each side of the equation.
12.9 + -12.9 + x = 3.8 + -12.9

Combine like terms: 12.9 + -12.9 = 0.0
0.0 + x = 3.8 + -12.9
x = 3.8 + -12.9

Combine like terms: 3.8 + -12.9 = -9.1
x = -9.1

Simplifying
x = -9.1

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