8x+3x=-9

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Solution for 8x+3x=-9 equation: 


Simplifying
8x + 3x = -9

Combine like terms: 8x + 3x = 11x
11x = -9

Solving
11x = -9

Solving for variable 'x'.

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

Divide each side by '11'.
x = -0.8181818182

Simplifying
x = -0.8181818182

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