9-3(y+4)=18

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Solution for 9-3(y+4)=18 equation:


Simplifying
9 + -3(y + 4) = 18

Reorder the terms:
9 + -3(4 + y) = 18
9 + (4 * -3 + y * -3) = 18
9 + (-12 + -3y) = 18

Combine like terms: 9 + -12 = -3
-3 + -3y = 18

Solving
-3 + -3y = 18

Solving for variable 'y'.

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

Add '3' to each side of the equation.
-3 + 3 + -3y = 18 + 3

Combine like terms: -3 + 3 = 0
0 + -3y = 18 + 3
-3y = 18 + 3

Combine like terms: 18 + 3 = 21
-3y = 21

Divide each side by '-3'.
y = -7

Simplifying
y = -7

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