21-4x=-5(4x+3)-5(-4-3x)

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


Simplifying
21 + -4x = -5(4x + 3) + -5(-4 + -3x)

Reorder the terms:
21 + -4x = -5(3 + 4x) + -5(-4 + -3x)
21 + -4x = (3 * -5 + 4x * -5) + -5(-4 + -3x)
21 + -4x = (-15 + -20x) + -5(-4 + -3x)
21 + -4x = -15 + -20x + (-4 * -5 + -3x * -5)
21 + -4x = -15 + -20x + (20 + 15x)

Reorder the terms:
21 + -4x = -15 + 20 + -20x + 15x

Combine like terms: -15 + 20 = 5
21 + -4x = 5 + -20x + 15x

Combine like terms: -20x + 15x = -5x
21 + -4x = 5 + -5x

Solving
21 + -4x = 5 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
21 + -4x + 5x = 5 + -5x + 5x

Combine like terms: -4x + 5x = 1x
21 + 1x = 5 + -5x + 5x

Combine like terms: -5x + 5x = 0
21 + 1x = 5 + 0
21 + 1x = 5

Add '-21' to each side of the equation.
21 + -21 + 1x = 5 + -21

Combine like terms: 21 + -21 = 0
0 + 1x = 5 + -21
1x = 5 + -21

Combine like terms: 5 + -21 = -16
1x = -16

Divide each side by '1'.
x = -16

Simplifying
x = -16

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