3(3x-7)=x-21

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Solution for 3(3x-7)=x-21 equation:


Simplifying
3(3x + -7) = x + -21

Reorder the terms:
3(-7 + 3x) = x + -21
(-7 * 3 + 3x * 3) = x + -21
(-21 + 9x) = x + -21

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

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

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

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

Solving
9x = 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.
9x + -1x = x + -1x

Combine like terms: 9x + -1x = 8x
8x = x + -1x

Combine like terms: x + -1x = 0
8x = 0

Divide each side by '8'.
x = 0

Simplifying
x = 0

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