4(y-3)=y+9

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


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

Reorder the terms:
4(-3 + y) = y + 9
(-3 * 4 + y * 4) = y + 9
(-12 + 4y) = y + 9

Reorder the terms:
-12 + 4y = 9 + y

Solving
-12 + 4y = 9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-12 + 4y + -1y = 9 + y + -1y

Combine like terms: 4y + -1y = 3y
-12 + 3y = 9 + y + -1y

Combine like terms: y + -1y = 0
-12 + 3y = 9 + 0
-12 + 3y = 9

Add '12' to each side of the equation.
-12 + 12 + 3y = 9 + 12

Combine like terms: -12 + 12 = 0
0 + 3y = 9 + 12
3y = 9 + 12

Combine like terms: 9 + 12 = 21
3y = 21

Divide each side by '3'.
y = 7

Simplifying
y = 7

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