-3x-(12x+5)+21=9+x-(13x-4)

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Solution for -3x-(12x+5)+21=9+x-(13x-4) equation:


Simplifying
-3x + -1(12x + 5) + 21 = 9 + x + -1(13x + -4)

Reorder the terms:
-3x + -1(5 + 12x) + 21 = 9 + x + -1(13x + -4)
-3x + (5 * -1 + 12x * -1) + 21 = 9 + x + -1(13x + -4)
-3x + (-5 + -12x) + 21 = 9 + x + -1(13x + -4)

Reorder the terms:
-5 + 21 + -3x + -12x = 9 + x + -1(13x + -4)

Combine like terms: -5 + 21 = 16
16 + -3x + -12x = 9 + x + -1(13x + -4)

Combine like terms: -3x + -12x = -15x
16 + -15x = 9 + x + -1(13x + -4)

Reorder the terms:
16 + -15x = 9 + x + -1(-4 + 13x)
16 + -15x = 9 + x + (-4 * -1 + 13x * -1)
16 + -15x = 9 + x + (4 + -13x)

Reorder the terms:
16 + -15x = 9 + 4 + x + -13x

Combine like terms: 9 + 4 = 13
16 + -15x = 13 + x + -13x

Combine like terms: x + -13x = -12x
16 + -15x = 13 + -12x

Solving
16 + -15x = 13 + -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.
16 + -15x + 12x = 13 + -12x + 12x

Combine like terms: -15x + 12x = -3x
16 + -3x = 13 + -12x + 12x

Combine like terms: -12x + 12x = 0
16 + -3x = 13 + 0
16 + -3x = 13

Add '-16' to each side of the equation.
16 + -16 + -3x = 13 + -16

Combine like terms: 16 + -16 = 0
0 + -3x = 13 + -16
-3x = 13 + -16

Combine like terms: 13 + -16 = -3
-3x = -3

Divide each side by '-3'.
x = 1

Simplifying
x = 1

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