0.9=0.4y-0.5

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Solution for 0.9=0.4y-0.5 equation: 


Simplifying
0.9 = 0.4y + -0.5

Reorder the terms:
0.9 = -0.5 + 0.4y

Solving
0.9 = -0.5 + 0.4y

Solving for variable 'y'.

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

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

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

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

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

Combine like terms: -0.5 + -0.9 = -1.4
-0.4y = -1.4

Divide each side by '-0.4'.
y = 3.5

Simplifying
y = 3.5

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