X+21=X*5-6

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Solution for X+21=X*5-6 equation:


Simplifying
X + 21 = X * 5 + -6

Reorder the terms:
21 + X = X * 5 + -6

Reorder the terms for easier multiplication:
21 + X = 5X + -6

Reorder the terms:
21 + X = -6 + 5X

Solving
21 + X = -6 + 5X

Solving for variable 'X'.

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

Add '-5X' to each side of the equation.
21 + X + -5X = -6 + 5X + -5X

Combine like terms: X + -5X = -4X
21 + -4X = -6 + 5X + -5X

Combine like terms: 5X + -5X = 0
21 + -4X = -6 + 0
21 + -4X = -6

Add '-21' to each side of the equation.
21 + -21 + -4X = -6 + -21

Combine like terms: 21 + -21 = 0
0 + -4X = -6 + -21
-4X = -6 + -21

Combine like terms: -6 + -21 = -27
-4X = -27

Divide each side by '-4'.
X = 6.75

Simplifying
X = 6.75

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