.4-.3y=2.5

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Solution for .4-.3y=2.5 equation: 


Simplifying
0.4 + -0.3y = 2.5

Solving
0.4 + -0.3y = 2.5

Solving for variable 'y'.

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

Add '-0.4' to each side of the equation.
0.4 + -0.4 + -0.3y = 2.5 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -0.3y = 2.5 + -0.4
-0.3y = 2.5 + -0.4

Combine like terms: 2.5 + -0.4 = 2.1
-0.3y = 2.1

Divide each side by '-0.3'.
y = -7

Simplifying
y = -7

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