3(2)-y=9

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Solution for 3(2)-y=9 equation: 


Simplifying
3(2) + -1y = 9

Multiply 3 * 2
6 + -1y = 9

Solving
6 + -1y = 9

Solving for variable 'y'.

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

Add '-6' to each side of the equation.
6 + -6 + -1y = 9 + -6

Combine like terms: 6 + -6 = 0
0 + -1y = 9 + -6
-1y = 9 + -6

Combine like terms: 9 + -6 = 3
-1y = 3

Divide each side by '-1'.
y = -3

Simplifying
y = -3

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