x-3.9=1.2-x

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Solution for x-3.9=1.2-x equation:


Simplifying
x + -3.9 = 1.2 + -1x

Reorder the terms:
-3.9 + x = 1.2 + -1x

Solving
-3.9 + x = 1.2 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
-3.9 + x + x = 1.2 + -1x + x

Combine like terms: x + x = 2x
-3.9 + 2x = 1.2 + -1x + x

Combine like terms: -1x + x = 0
-3.9 + 2x = 1.2 + 0
-3.9 + 2x = 1.2

Add '3.9' to each side of the equation.
-3.9 + 3.9 + 2x = 1.2 + 3.9

Combine like terms: -3.9 + 3.9 = 0.0
0.0 + 2x = 1.2 + 3.9
2x = 1.2 + 3.9

Combine like terms: 1.2 + 3.9 = 5.1
2x = 5.1

Divide each side by '2'.
x = 2.55

Simplifying
x = 2.55

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