5x-9=3x-21

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Solution for 5x-9=3x-21 equation:


Simplifying
5x + -9 = 3x + -21

Reorder the terms:
-9 + 5x = 3x + -21

Reorder the terms:
-9 + 5x = -21 + 3x

Solving
-9 + 5x = -21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-9 + 5x + -3x = -21 + 3x + -3x

Combine like terms: 5x + -3x = 2x
-9 + 2x = -21 + 3x + -3x

Combine like terms: 3x + -3x = 0
-9 + 2x = -21 + 0
-9 + 2x = -21

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

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

Combine like terms: -21 + 9 = -12
2x = -12

Divide each side by '2'.
x = -6

Simplifying
x = -6

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