2x=-21-(12+x)

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Solution for 2x=-21-(12+x) equation:


Simplifying
2x = -21 + -1(12 + x)
2x = -21 + (12 * -1 + x * -1)
2x = -21 + (-12 + -1x)

Combine like terms: -21 + -12 = -33
2x = -33 + -1x

Solving
2x = -33 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
2x + x = -33 + -1x + x

Combine like terms: 2x + x = 3x
3x = -33 + -1x + x

Combine like terms: -1x + x = 0
3x = -33 + 0
3x = -33

Divide each side by '3'.
x = -11

Simplifying
x = -11

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