9.9=x-3.9

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Solution for 9.9=x-3.9 equation: 


Simplifying
9.9 = x + -3.9

Reorder the terms:
9.9 = -3.9 + x

Solving
9.9 = -3.9 + 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.
9.9 + -1x = -3.9 + x + -1x

Combine like terms: x + -1x = 0
9.9 + -1x = -3.9 + 0
9.9 + -1x = -3.9

Add '-9.9' to each side of the equation.
9.9 + -9.9 + -1x = -3.9 + -9.9

Combine like terms: 9.9 + -9.9 = 0.0
0.0 + -1x = -3.9 + -9.9
-1x = -3.9 + -9.9

Combine like terms: -3.9 + -9.9 = -13.8
-1x = -13.8

Divide each side by '-1'.
x = 13.8

Simplifying
x = 13.8

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