X+12-3x+8=42

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Solution for X+12-3x+8=42 equation:


Simplifying
X + 12 + -3x + 8 = 42

Reorder the terms:
12 + 8 + X + -3x = 42

Combine like terms: 12 + 8 = 20
20 + X + -3x = 42

Solving
20 + X + -3x = 42

Solving for variable 'X'.

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

Add '-20' to each side of the equation.
20 + X + -20 + -3x = 42 + -20

Reorder the terms:
20 + -20 + X + -3x = 42 + -20

Combine like terms: 20 + -20 = 0
0 + X + -3x = 42 + -20
X + -3x = 42 + -20

Combine like terms: 42 + -20 = 22
X + -3x = 22

Add '3x' to each side of the equation.
X + -3x + 3x = 22 + 3x

Combine like terms: -3x + 3x = 0
X + 0 = 22 + 3x
X = 22 + 3x

Simplifying
X = 22 + 3x

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