8X+21=2X+129

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Solution for 8X+21=2X+129 equation:


Simplifying
8X + 21 = 2X + 129

Reorder the terms:
21 + 8X = 2X + 129

Reorder the terms:
21 + 8X = 129 + 2X

Solving
21 + 8X = 129 + 2X

Solving for variable 'X'.

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

Add '-2X' to each side of the equation.
21 + 8X + -2X = 129 + 2X + -2X

Combine like terms: 8X + -2X = 6X
21 + 6X = 129 + 2X + -2X

Combine like terms: 2X + -2X = 0
21 + 6X = 129 + 0
21 + 6X = 129

Add '-21' to each side of the equation.
21 + -21 + 6X = 129 + -21

Combine like terms: 21 + -21 = 0
0 + 6X = 129 + -21
6X = 129 + -21

Combine like terms: 129 + -21 = 108
6X = 108

Divide each side by '6'.
X = 18

Simplifying
X = 18

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