.4=.8c

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Solution for .4=.8c equation:


Simplifying
0.4 = 0.8c

Solving
0.4 = 0.8c

Solving for variable 'c'.

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

Add '-0.8c' to each side of the equation.
0.4 + -0.8c = 0.8c + -0.8c

Combine like terms: 0.8c + -0.8c = 0.0
0.4 + -0.8c = 0.0

Add '-0.4' to each side of the equation.
0.4 + -0.4 + -0.8c = 0.0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -0.8c = 0.0 + -0.4
-0.8c = 0.0 + -0.4

Combine like terms: 0.0 + -0.4 = -0.4
-0.8c = -0.4

Divide each side by '-0.8'.
c = 0.5

Simplifying
c = 0.5

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