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

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


Simplifying
3x + -4(4 + -3x) = 5(x + -3) + -21
3x + (4 * -4 + -3x * -4) = 5(x + -3) + -21
3x + (-16 + 12x) = 5(x + -3) + -21

Reorder the terms:
-16 + 3x + 12x = 5(x + -3) + -21

Combine like terms: 3x + 12x = 15x
-16 + 15x = 5(x + -3) + -21

Reorder the terms:
-16 + 15x = 5(-3 + x) + -21
-16 + 15x = (-3 * 5 + x * 5) + -21
-16 + 15x = (-15 + 5x) + -21

Reorder the terms:
-16 + 15x = -15 + -21 + 5x

Combine like terms: -15 + -21 = -36
-16 + 15x = -36 + 5x

Solving
-16 + 15x = -36 + 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.
-16 + 15x + -5x = -36 + 5x + -5x

Combine like terms: 15x + -5x = 10x
-16 + 10x = -36 + 5x + -5x

Combine like terms: 5x + -5x = 0
-16 + 10x = -36 + 0
-16 + 10x = -36

Add '16' to each side of the equation.
-16 + 16 + 10x = -36 + 16

Combine like terms: -16 + 16 = 0
0 + 10x = -36 + 16
10x = -36 + 16

Combine like terms: -36 + 16 = -20
10x = -20

Divide each side by '10'.
x = -2

Simplifying
x = -2

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