8x-21=6x+9

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Solution for 8x-21=6x+9 equation:


Simplifying
8x + -21 = 6x + 9

Reorder the terms:
-21 + 8x = 6x + 9

Reorder the terms:
-21 + 8x = 9 + 6x

Solving
-21 + 8x = 9 + 6x

Solving for variable 'x'.

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

Add '-6x' to each side of the equation.
-21 + 8x + -6x = 9 + 6x + -6x

Combine like terms: 8x + -6x = 2x
-21 + 2x = 9 + 6x + -6x

Combine like terms: 6x + -6x = 0
-21 + 2x = 9 + 0
-21 + 2x = 9

Add '21' to each side of the equation.
-21 + 21 + 2x = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 2x = 9 + 21
2x = 9 + 21

Combine like terms: 9 + 21 = 30
2x = 30

Divide each side by '2'.
x = 15

Simplifying
x = 15

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