3x+90=-78-9x

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Solution for 3x+90=-78-9x equation:


Simplifying
3x + 90 = -78 + -9x

Reorder the terms:
90 + 3x = -78 + -9x

Solving
90 + 3x = -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.
90 + 3x + 9x = -78 + -9x + 9x

Combine like terms: 3x + 9x = 12x
90 + 12x = -78 + -9x + 9x

Combine like terms: -9x + 9x = 0
90 + 12x = -78 + 0
90 + 12x = -78

Add '-90' to each side of the equation.
90 + -90 + 12x = -78 + -90

Combine like terms: 90 + -90 = 0
0 + 12x = -78 + -90
12x = -78 + -90

Combine like terms: -78 + -90 = -168
12x = -168

Divide each side by '12'.
x = -14

Simplifying
x = -14

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