.9x=.4-.3x

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Solution for .9x=.4-.3x equation: 


Simplifying
0.9x = 0.4 + -0.3x

Solving
0.9x = 0.4 + -0.3x

Solving for variable 'x'.

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

Add '0.3x' to each side of the equation.
0.9x + 0.3x = 0.4 + -0.3x + 0.3x

Combine like terms: 0.9x + 0.3x = 1.2x
1.2x = 0.4 + -0.3x + 0.3x

Combine like terms: -0.3x + 0.3x = 0.0
1.2x = 0.4 + 0.0
1.2x = 0.4

Divide each side by '1.2'.
x = 0.3333333333

Simplifying
x = 0.3333333333

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