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

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


Simplifying
8x + 21 + -1x = 8(x + 3)

Reorder the terms:
21 + 8x + -1x = 8(x + 3)

Combine like terms: 8x + -1x = 7x
21 + 7x = 8(x + 3)

Reorder the terms:
21 + 7x = 8(3 + x)
21 + 7x = (3 * 8 + x * 8)
21 + 7x = (24 + 8x)

Solving
21 + 7x = 24 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
21 + 7x + -8x = 24 + 8x + -8x

Combine like terms: 7x + -8x = -1x
21 + -1x = 24 + 8x + -8x

Combine like terms: 8x + -8x = 0
21 + -1x = 24 + 0
21 + -1x = 24

Add '-21' to each side of the equation.
21 + -21 + -1x = 24 + -21

Combine like terms: 21 + -21 = 0
0 + -1x = 24 + -21
-1x = 24 + -21

Combine like terms: 24 + -21 = 3
-1x = 3

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

Simplifying
x = -3

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