13.1=17.9+x

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Solution for 13.1=17.9+x equation: 


Simplifying
13.1 = 17.9 + x

Solving
13.1 = 17.9 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
13.1 + -1x = 17.9 + x + -1x

Combine like terms: x + -1x = 0
13.1 + -1x = 17.9 + 0
13.1 + -1x = 17.9

Add '-13.1' to each side of the equation.
13.1 + -13.1 + -1x = 17.9 + -13.1

Combine like terms: 13.1 + -13.1 = 0.0
0.0 + -1x = 17.9 + -13.1
-1x = 17.9 + -13.1

Combine like terms: 17.9 + -13.1 = 4.8
-1x = 4.8

Divide each side by '-1'.
x = -4.8

Simplifying
x = -4.8

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