4.5*3-y=9

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Solution for 4.5*3-y=9 equation: 


Simplifying
4.5 * 3 + -1y = 9

Multiply 4.5 * 3
13.5 + -1y = 9

Solving
13.5 + -1y = 9

Solving for variable 'y'.

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

Add '-13.5' to each side of the equation.
13.5 + -13.5 + -1y = 9 + -13.5

Combine like terms: 13.5 + -13.5 = 0.0
0.0 + -1y = 9 + -13.5
-1y = 9 + -13.5

Combine like terms: 9 + -13.5 = -4.5
-1y = -4.5

Divide each side by '-1'.
y = 4.5

Simplifying
y = 4.5

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