.8x-9=.4

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Solution for .8x-9=.4 equation: 


Simplifying
0.8x + -9 = 0.4

Reorder the terms:
-9 + 0.8x = 0.4

Solving
-9 + 0.8x = 0.4

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 0.8x = 0.4 + 9

Combine like terms: -9 + 9 = 0
0 + 0.8x = 0.4 + 9
0.8x = 0.4 + 9

Combine like terms: 0.4 + 9 = 9.4
0.8x = 9.4

Divide each side by '0.8'.
x = 11.75

Simplifying
x = 11.75

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