21=9x+1-5x

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Solution for 21=9x+1-5x equation:


Simplifying
21 = 9x + 1 + -5x

Reorder the terms:
21 = 1 + 9x + -5x

Combine like terms: 9x + -5x = 4x
21 = 1 + 4x

Solving
21 = 1 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
21 + -4x = 1 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + -4x = 1 + 0
21 + -4x = 1

Add '-21' to each side of the equation.
21 + -21 + -4x = 1 + -21

Combine like terms: 21 + -21 = 0
0 + -4x = 1 + -21
-4x = 1 + -21

Combine like terms: 1 + -21 = -20
-4x = -20

Divide each side by '-4'.
x = 5

Simplifying
x = 5

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