6+12=-78-9x

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Solution for 6+12=-78-9x equation: 


Simplifying
6 + 12 = -78 + -9x

Combine like terms: 6 + 12 = 18
18 = -78 + -9x

Solving
18 = -78 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
18 + 9x = -78 + -9x + 9x

Combine like terms: -9x + 9x = 0
18 + 9x = -78 + 0
18 + 9x = -78

Add '-18' to each side of the equation.
18 + -18 + 9x = -78 + -18

Combine like terms: 18 + -18 = 0
0 + 9x = -78 + -18
9x = -78 + -18

Combine like terms: -78 + -18 = -96
9x = -96

Divide each side by '9'.
x = -10.66666667

Simplifying
x = -10.66666667

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