y-4(3+y)=9

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


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

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

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

Solving
-12 + -3y = 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 + -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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