X-8.9=3.5

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Solution for X-8.9=3.5 equation: 


Simplifying
X + -8.9 = 3.5

Reorder the terms:
-8.9 + X = 3.5

Solving
-8.9 + X = 3.5

Solving for variable 'X'.

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

Add '8.9' to each side of the equation.
-8.9 + 8.9 + X = 3.5 + 8.9

Combine like terms: -8.9 + 8.9 = 0.0
0.0 + X = 3.5 + 8.9
X = 3.5 + 8.9

Combine like terms: 3.5 + 8.9 = 12.4
X = 12.4

Simplifying
X = 12.4

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