21=-8x+3(x-8)

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Solution for 21=-8x+3(x-8) equation:


Simplifying
21 = -8x + 3(x + -8)

Reorder the terms:
21 = -8x + 3(-8 + x)
21 = -8x + (-8 * 3 + x * 3)
21 = -8x + (-24 + 3x)

Reorder the terms:
21 = -24 + -8x + 3x

Combine like terms: -8x + 3x = -5x
21 = -24 + -5x

Solving
21 = -24 + -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 + 5x = -24 + -5x + 5x

Combine like terms: -5x + 5x = 0
21 + 5x = -24 + 0
21 + 5x = -24

Add '-21' to each side of the equation.
21 + -21 + 5x = -24 + -21

Combine like terms: 21 + -21 = 0
0 + 5x = -24 + -21
5x = -24 + -21

Combine like terms: -24 + -21 = -45
5x = -45

Divide each side by '5'.
x = -9

Simplifying
x = -9

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