X-3=3X+15

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Solution for X-3=3X+15 equation:


Simplifying
X + -3 = 3X + 15

Reorder the terms:
-3 + X = 3X + 15

Reorder the terms:
-3 + X = 15 + 3X

Solving
-3 + X = 15 + 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.
-3 + X + -3X = 15 + 3X + -3X

Combine like terms: X + -3X = -2X
-3 + -2X = 15 + 3X + -3X

Combine like terms: 3X + -3X = 0
-3 + -2X = 15 + 0
-3 + -2X = 15

Add '3' to each side of the equation.
-3 + 3 + -2X = 15 + 3

Combine like terms: -3 + 3 = 0
0 + -2X = 15 + 3
-2X = 15 + 3

Combine like terms: 15 + 3 = 18
-2X = 18

Divide each side by '-2'.
X = -9

Simplifying
X = -9

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