[7+x]=-9

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Solution for [7+x]=-9 equation: 


Simplifying
[7 + x] = -9

Remove brackets around [7 + x]
7 + x = -9

Solving
7 + x = -9

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + x = -9 + -7

Combine like terms: 7 + -7 = 0
0 + x = -9 + -7
x = -9 + -7

Combine like terms: -9 + -7 = -16
x = -16

Simplifying
x = -16

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