12-3(7+X)=9

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Solution for 12-3(7+X)=9 equation:


Simplifying
12 + -3(7 + X) = 9
12 + (7 * -3 + X * -3) = 9
12 + (-21 + -3X) = 9

Combine like terms: 12 + -21 = -9
-9 + -3X = 9

Solving
-9 + -3X = 9

Solving for variable 'X'.

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

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

Combine like terms: -9 + 9 = 0
0 + -3X = 9 + 9
-3X = 9 + 9

Combine like terms: 9 + 9 = 18
-3X = 18

Divide each side by '-3'.
X = -6

Simplifying
X = -6

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