X+7=3X-18

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Solution for X+7=3X-18 equation:


Simplifying
X + 7 = 3X + -18

Reorder the terms:
7 + X = 3X + -18

Reorder the terms:
7 + X = -18 + 3X

Solving
7 + X = -18 + 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 + X + -3X = -18 + 3X + -3X

Combine like terms: X + -3X = -2X
7 + -2X = -18 + 3X + -3X

Combine like terms: 3X + -3X = 0
7 + -2X = -18 + 0
7 + -2X = -18

Add '-7' to each side of the equation.
7 + -7 + -2X = -18 + -7

Combine like terms: 7 + -7 = 0
0 + -2X = -18 + -7
-2X = -18 + -7

Combine like terms: -18 + -7 = -25
-2X = -25

Divide each side by '-2'.
X = 12.5

Simplifying
X = 12.5

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