.5x+1.8-.2x=3.9

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Solution for .5x+1.8-.2x=3.9 equation: 


Simplifying
0.5x + 1.8 + -0.2x = 3.9

Reorder the terms:
1.8 + 0.5x + -0.2x = 3.9

Combine like terms: 0.5x + -0.2x = 0.3x
1.8 + 0.3x = 3.9

Solving
1.8 + 0.3x = 3.9

Solving for variable 'x'.

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

Add '-1.8' to each side of the equation.
1.8 + -1.8 + 0.3x = 3.9 + -1.8

Combine like terms: 1.8 + -1.8 = 0.0
0.0 + 0.3x = 3.9 + -1.8
0.3x = 3.9 + -1.8

Combine like terms: 3.9 + -1.8 = 2.1
0.3x = 2.1

Divide each side by '0.3'.
x = 7

Simplifying
x = 7

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