X+X+7=3X-7

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Solution for X+X+7=3X-7 equation:


Simplifying
X + X + 7 = 3X + -7

Reorder the terms:
7 + X + X = 3X + -7

Combine like terms: X + X = 2X
7 + 2X = 3X + -7

Reorder the terms:
7 + 2X = -7 + 3X

Solving
7 + 2X = -7 + 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.
7 + 2X + -3X = -7 + 3X + -3X

Combine like terms: 2X + -3X = -1X
7 + -1X = -7 + 3X + -3X

Combine like terms: 3X + -3X = 0
7 + -1X = -7 + 0
7 + -1X = -7

Add '-7' to each side of the equation.
7 + -7 + -1X = -7 + -7

Combine like terms: 7 + -7 = 0
0 + -1X = -7 + -7
-1X = -7 + -7

Combine like terms: -7 + -7 = -14
-1X = -14

Divide each side by '-1'.
X = 14

Simplifying
X = 14

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