6x-21=90

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Solution for 6x-21=90 equation: 


Simplifying
6x + -21 = 90

Reorder the terms:
-21 + 6x = 90

Solving
-21 + 6x = 90

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 6x = 90 + 21

Combine like terms: -21 + 21 = 0
0 + 6x = 90 + 21
6x = 90 + 21

Combine like terms: 90 + 21 = 111
6x = 111

Divide each side by '6'.
x = 18.5

Simplifying
x = 18.5

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