4.5-0.2x+0.4x=0.3

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Solution for 4.5-0.2x+0.4x=0.3 equation: 


Simplifying
4.5 + -0.2x + 0.4x = 0.3

Combine like terms: -0.2x + 0.4x = 0.2x
4.5 + 0.2x = 0.3

Solving
4.5 + 0.2x = 0.3

Solving for variable 'x'.

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

Add '-4.5' to each side of the equation.
4.5 + -4.5 + 0.2x = 0.3 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + 0.2x = 0.3 + -4.5
0.2x = 0.3 + -4.5

Combine like terms: 0.3 + -4.5 = -4.2
0.2x = -4.2

Divide each side by '0.2'.
x = -21

Simplifying
x = -21

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