0.8y-400=x

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Solution for 0.8y-400=x equation: 


Simplifying
0.8y + -400 = x

Reorder the terms:
-400 + 0.8y = x

Solving
-400 + 0.8y = x

Solving for variable 'y'.

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

Add '400' to each side of the equation.
-400 + 400 + 0.8y = 400 + x

Combine like terms: -400 + 400 = 0
0 + 0.8y = 400 + x
0.8y = 400 + x

Divide each side by '0.8'.
y = 500 + 1.25x

Simplifying
y = 500 + 1.25x

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