3x+.8=20

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Solution for 3x+.8=20 equation: 


Simplifying
3x + 0.8 = 20

Reorder the terms:
0.8 + 3x = 20

Solving
0.8 + 3x = 20

Solving for variable 'x'.

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

Add '-0.8' to each side of the equation.
0.8 + -0.8 + 3x = 20 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 3x = 20 + -0.8
3x = 20 + -0.8

Combine like terms: 20 + -0.8 = 19.2
3x = 19.2

Divide each side by '3'.
x = 6.4

Simplifying
x = 6.4

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