-21-8x=-x-7(1+2x)

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Solution for -21-8x=-x-7(1+2x) equation:


Simplifying
-21 + -8x = -1x + -7(1 + 2x)
-21 + -8x = -1x + (1 * -7 + 2x * -7)
-21 + -8x = -1x + (-7 + -14x)

Reorder the terms:
-21 + -8x = -7 + -1x + -14x

Combine like terms: -1x + -14x = -15x
-21 + -8x = -7 + -15x

Solving
-21 + -8x = -7 + -15x

Solving for variable 'x'.

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

Add '15x' to each side of the equation.
-21 + -8x + 15x = -7 + -15x + 15x

Combine like terms: -8x + 15x = 7x
-21 + 7x = -7 + -15x + 15x

Combine like terms: -15x + 15x = 0
-21 + 7x = -7 + 0
-21 + 7x = -7

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

Combine like terms: -21 + 21 = 0
0 + 7x = -7 + 21
7x = -7 + 21

Combine like terms: -7 + 21 = 14
7x = 14

Divide each side by '7'.
x = 2

Simplifying
x = 2

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