2X+9=3X-12

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Solution for 2X+9=3X-12 equation:


Simplifying
2X + 9 = 3X + -12

Reorder the terms:
9 + 2X = 3X + -12

Reorder the terms:
9 + 2X = -12 + 3X

Solving
9 + 2X = -12 + 3X

Solving for variable 'X'.

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

Add '-3X' to each side of the equation.
9 + 2X + -3X = -12 + 3X + -3X

Combine like terms: 2X + -3X = -1X
9 + -1X = -12 + 3X + -3X

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

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

Combine like terms: 9 + -9 = 0
0 + -1X = -12 + -9
-1X = -12 + -9

Combine like terms: -12 + -9 = -21
-1X = -21

Divide each side by '-1'.
X = 21

Simplifying
X = 21

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