Y=80+0.9Y

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Solution for Y=80+0.9Y equation: 


Simplifying
Y = 80 + 0.9Y

Solving
Y = 80 + 0.9Y

Solving for variable 'Y'.

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

Add '-0.9Y' to each side of the equation.
Y + -0.9Y = 80 + 0.9Y + -0.9Y

Combine like terms: Y + -0.9Y = 0.1Y
0.1Y = 80 + 0.9Y + -0.9Y

Combine like terms: 0.9Y + -0.9Y = 0.0
0.1Y = 80 + 0.0
0.1Y = 80

Divide each side by '0.1'.
Y = 800

Simplifying
Y = 800

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