21x-9=x+27

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Solution for 21x-9=x+27 equation:


Simplifying
21x + -9 = x + 27

Reorder the terms:
-9 + 21x = x + 27

Reorder the terms:
-9 + 21x = 27 + x

Solving
-9 + 21x = 27 + x

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.
-9 + 21x + -1x = 27 + x + -1x

Combine like terms: 21x + -1x = 20x
-9 + 20x = 27 + x + -1x

Combine like terms: x + -1x = 0
-9 + 20x = 27 + 0
-9 + 20x = 27

Add '9' to each side of the equation.
-9 + 9 + 20x = 27 + 9

Combine like terms: -9 + 9 = 0
0 + 20x = 27 + 9
20x = 27 + 9

Combine like terms: 27 + 9 = 36
20x = 36

Divide each side by '20'.
x = 1.8

Simplifying
x = 1.8

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