8x-3+4x=9x-21

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Solution for 8x-3+4x=9x-21 equation:


Simplifying
8x + -3 + 4x = 9x + -21

Reorder the terms:
-3 + 8x + 4x = 9x + -21

Combine like terms: 8x + 4x = 12x
-3 + 12x = 9x + -21

Reorder the terms:
-3 + 12x = -21 + 9x

Solving
-3 + 12x = -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 + 12x + -9x = -21 + 9x + -9x

Combine like terms: 12x + -9x = 3x
-3 + 3x = -21 + 9x + -9x

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

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

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

Combine like terms: -21 + 3 = -18
3x = -18

Divide each side by '3'.
x = -6

Simplifying
x = -6

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