.4x-.3x+.4x=3

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Solution for .4x-.3x+.4x=3 equation: 


Simplifying
0.4x + -0.3x + 0.4x = 3

Combine like terms: 0.4x + -0.3x = 0.1x
0.1x + 0.4x = 3

Combine like terms: 0.1x + 0.4x = 0.5x
0.5x = 3

Solving
0.5x = 3

Solving for variable 'x'.

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

Divide each side by '0.5'.
x = 6

Simplifying
x = 6

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