y-3(4+-2y)=9

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Solution for y-3(4+-2y)=9 equation:


Simplifying
y + -3(4 + -2y) = 9
y + (4 * -3 + -2y * -3) = 9
y + (-12 + 6y) = 9

Reorder the terms:
-12 + y + 6y = 9

Combine like terms: y + 6y = 7y
-12 + 7y = 9

Solving
-12 + 7y = 9

Solving for variable 'y'.

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

Add '12' to each side of the equation.
-12 + 12 + 7y = 9 + 12

Combine like terms: -12 + 12 = 0
0 + 7y = 9 + 12
7y = 9 + 12

Combine like terms: 9 + 12 = 21
7y = 21

Divide each side by '7'.
y = 3

Simplifying
y = 3

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