15x+3=9x-21

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Solution for 15x+3=9x-21 equation:


Simplifying
15x + 3 = 9x + -21

Reorder the terms:
3 + 15x = 9x + -21

Reorder the terms:
3 + 15x = -21 + 9x

Solving
3 + 15x = -21 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
3 + 15x + -9x = -21 + 9x + -9x

Combine like terms: 15x + -9x = 6x
3 + 6x = -21 + 9x + -9x

Combine like terms: 9x + -9x = 0
3 + 6x = -21 + 0
3 + 6x = -21

Add '-3' to each side of the equation.
3 + -3 + 6x = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 6x = -21 + -3
6x = -21 + -3

Combine like terms: -21 + -3 = -24
6x = -24

Divide each side by '6'.
x = -4

Simplifying
x = -4

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