0.8y-0.4=0.9-0.5y

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Solution for 0.8y-0.4=0.9-0.5y equation: 


Simplifying
0.8y + -0.4 = 0.9 + -0.5y

Reorder the terms:
-0.4 + 0.8y = 0.9 + -0.5y

Solving
-0.4 + 0.8y = 0.9 + -0.5y

Solving for variable 'y'.

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

Add '0.5y' to each side of the equation.
-0.4 + 0.8y + 0.5y = 0.9 + -0.5y + 0.5y

Combine like terms: 0.8y + 0.5y = 1.3y
-0.4 + 1.3y = 0.9 + -0.5y + 0.5y

Combine like terms: -0.5y + 0.5y = 0.0
-0.4 + 1.3y = 0.9 + 0.0
-0.4 + 1.3y = 0.9

Add '0.4' to each side of the equation.
-0.4 + 0.4 + 1.3y = 0.9 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 1.3y = 0.9 + 0.4
1.3y = 0.9 + 0.4

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

Divide each side by '1.3'.
y = 1

Simplifying
y = 1

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