9=6-[x+2]

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Solution for 9=6-[x+2] equation:


Simplifying
9 = 6 + -1[x + 2]

Reorder the terms:
9 = 6 + -1[2 + x]
9 = 6 + [2 * -1 + x * -1]
9 = 6 + [-2 + -1x]

Combine like terms: 6 + -2 = 4
9 = 4 + -1x

Solving
9 = 4 + -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.
9 + x = 4 + -1x + x

Combine like terms: -1x + x = 0
9 + x = 4 + 0
9 + x = 4

Add '-9' to each side of the equation.
9 + -9 + x = 4 + -9

Combine like terms: 9 + -9 = 0
0 + x = 4 + -9
x = 4 + -9

Combine like terms: 4 + -9 = -5
x = -5

Simplifying
x = -5

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