x+8=2(x+21)

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Solution for x+8=2(x+21) equation:


Simplifying
x + 8 = 2(x + 21)

Reorder the terms:
8 + x = 2(x + 21)

Reorder the terms:
8 + x = 2(21 + x)
8 + x = (21 * 2 + x * 2)
8 + x = (42 + 2x)

Solving
8 + x = 42 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
8 + x + -2x = 42 + 2x + -2x

Combine like terms: x + -2x = -1x
8 + -1x = 42 + 2x + -2x

Combine like terms: 2x + -2x = 0
8 + -1x = 42 + 0
8 + -1x = 42

Add '-8' to each side of the equation.
8 + -8 + -1x = 42 + -8

Combine like terms: 8 + -8 = 0
0 + -1x = 42 + -8
-1x = 42 + -8

Combine like terms: 42 + -8 = 34
-1x = 34

Divide each side by '-1'.
x = -34

Simplifying
x = -34

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