20-0.4x=13.8

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Solution for 20-0.4x=13.8 equation: 


Simplifying
20 + -0.4x = 13.8

Solving
20 + -0.4x = 13.8

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -0.4x = 13.8 + -20

Combine like terms: 20 + -20 = 0
0 + -0.4x = 13.8 + -20
-0.4x = 13.8 + -20

Combine like terms: 13.8 + -20 = -6.2
-0.4x = -6.2

Divide each side by '-0.4'.
x = 15.5

Simplifying
x = 15.5

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