c-0.4=0.9

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Solution for c-0.4=0.9 equation: 


Simplifying
c + -0.4 = 0.9

Reorder the terms:
-0.4 + c = 0.9

Solving
-0.4 + c = 0.9

Solving for variable 'c'.

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

Add '0.4' to each side of the equation.
-0.4 + 0.4 + c = 0.9 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + c = 0.9 + 0.4
c = 0.9 + 0.4

Combine like terms: 0.9 + 0.4 = 1.3
c = 1.3

Simplifying
c = 1.3

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