13.9-x=4

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Solution for 13.9-x=4 equation: 


Simplifying
13.9 + -1x = 4

Solving
13.9 + -1x = 4

Solving for variable 'x'.

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

Add '-13.9' to each side of the equation.
13.9 + -13.9 + -1x = 4 + -13.9

Combine like terms: 13.9 + -13.9 = 0.0
0.0 + -1x = 4 + -13.9
-1x = 4 + -13.9

Combine like terms: 4 + -13.9 = -9.9
-1x = -9.9

Divide each side by '-1'.
x = 9.9

Simplifying
x = 9.9

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