5-21=9X-3-8X

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Solution for 5-21=9X-3-8X equation:


Simplifying
5 + -21 = 9X + -3 + -8X

Combine like terms: 5 + -21 = -16
-16 = 9X + -3 + -8X

Reorder the terms:
-16 = -3 + 9X + -8X

Combine like terms: 9X + -8X = 1X
-16 = -3 + 1X

Solving
-16 = -3 + 1X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
-16 + -1X = -3 + 1X + -1X

Combine like terms: 1X + -1X = 0
-16 + -1X = -3 + 0
-16 + -1X = -3

Add '16' to each side of the equation.
-16 + 16 + -1X = -3 + 16

Combine like terms: -16 + 16 = 0
0 + -1X = -3 + 16
-1X = -3 + 16

Combine like terms: -3 + 16 = 13
-1X = 13

Divide each side by '-1'.
X = -13

Simplifying
X = -13

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