x-0.9=3

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Solution for x-0.9=3 equation: 


Simplifying
x + -0.9 = 3

Reorder the terms:
-0.9 + x = 3

Solving
-0.9 + x = 3

Solving for variable 'x'.

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

Add '0.9' to each side of the equation.
-0.9 + 0.9 + x = 3 + 0.9

Combine like terms: -0.9 + 0.9 = 0.0
0.0 + x = 3 + 0.9
x = 3 + 0.9

Combine like terms: 3 + 0.9 = 3.9
x = 3.9

Simplifying
x = 3.9

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