3.9=3x

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Solution for 3.9=3x equation:


Simplifying
3.9 = 3x

Solving
3.9 = 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
3.9 + -3x = 3x + -3x

Combine like terms: 3x + -3x = 0
3.9 + -3x = 0

Add '-3.9' to each side of the equation.
3.9 + -3.9 + -3x = 0 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + -3x = 0 + -3.9
-3x = 0 + -3.9

Combine like terms: 0 + -3.9 = -3.9
-3x = -3.9

Divide each side by '-3'.
x = 1.3

Simplifying
x = 1.3

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