0.50(9.0+-1y)+0.20y=3.45

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Solution for 0.50(9.0+-1y)+0.20y=3.45 equation: 


Simplifying
0.50(9.0 + -1y) + 0.20y = 3.45
(9.0 * 0.50 + -1y * 0.50) + 0.20y = 3.45
(4.5 + -0.5y) + 0.20y = 3.45

Combine like terms: -0.5y + 0.20y = -0.3y
4.5 + -0.3y = 3.45

Solving
4.5 + -0.3y = 3.45

Solving for variable 'y'.

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

Add '-4.5' to each side of the equation.
4.5 + -4.5 + -0.3y = 3.45 + -4.5

Combine like terms: 4.5 + -4.5 = 0.0
0.0 + -0.3y = 3.45 + -4.5
-0.3y = 3.45 + -4.5

Combine like terms: 3.45 + -4.5 = -1.05
-0.3y = -1.05

Divide each side by '-0.3'.
y = 3.5

Simplifying
y = 3.5

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