(21x-12)-(12x-24)=12x-24

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Solution for (21x-12)-(12x-24)=12x-24 equation:


Simplifying
(21x + -12) + -1(12x + -24) = 12x + -24

Reorder the terms:
(-12 + 21x) + -1(12x + -24) = 12x + -24

Remove parenthesis around (-12 + 21x)
-12 + 21x + -1(12x + -24) = 12x + -24

Reorder the terms:
-12 + 21x + -1(-24 + 12x) = 12x + -24
-12 + 21x + (-24 * -1 + 12x * -1) = 12x + -24
-12 + 21x + (24 + -12x) = 12x + -24

Reorder the terms:
-12 + 24 + 21x + -12x = 12x + -24

Combine like terms: -12 + 24 = 12
12 + 21x + -12x = 12x + -24

Combine like terms: 21x + -12x = 9x
12 + 9x = 12x + -24

Reorder the terms:
12 + 9x = -24 + 12x

Solving
12 + 9x = -24 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
12 + 9x + -12x = -24 + 12x + -12x

Combine like terms: 9x + -12x = -3x
12 + -3x = -24 + 12x + -12x

Combine like terms: 12x + -12x = 0
12 + -3x = -24 + 0
12 + -3x = -24

Add '-12' to each side of the equation.
12 + -12 + -3x = -24 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = -24 + -12
-3x = -24 + -12

Combine like terms: -24 + -12 = -36
-3x = -36

Divide each side by '-3'.
x = 12

Simplifying
x = 12

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