3.5+0.3x=0.8

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Solution for 3.5+0.3x=0.8 equation: 


Simplifying
3.5 + 0.3x = 0.8

Solving
3.5 + 0.3x = 0.8

Solving for variable 'x'.

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

Add '-3.5' to each side of the equation.
3.5 + -3.5 + 0.3x = 0.8 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + 0.3x = 0.8 + -3.5
0.3x = 0.8 + -3.5

Combine like terms: 0.8 + -3.5 = -2.7
0.3x = -2.7

Divide each side by '0.3'.
x = -9

Simplifying
x = -9

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