3x+9+5x=-81

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Solution for 3x+9+5x=-81 equation:


Simplifying
3x + 9 + 5x = -81

Reorder the terms:
9 + 3x + 5x = -81

Combine like terms: 3x + 5x = 8x
9 + 8x = -81

Solving
9 + 8x = -81

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 8x = -81 + -9

Combine like terms: 9 + -9 = 0
0 + 8x = -81 + -9
8x = -81 + -9

Combine like terms: -81 + -9 = -90
8x = -90

Divide each side by '8'.
x = -11.25

Simplifying
x = -11.25

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