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Simplifying -3x + -45 = 99 + -12x Reorder the terms: -45 + -3x = 99 + -12x Solving -45 + -3x = 99 + -12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12x' to each side of the equation. -45 + -3x + 12x = 99 + -12x + 12x Combine like terms: -3x + 12x = 9x -45 + 9x = 99 + -12x + 12x Combine like terms: -12x + 12x = 0 -45 + 9x = 99 + 0 -45 + 9x = 99 Add '45' to each side of the equation. -45 + 45 + 9x = 99 + 45 Combine like terms: -45 + 45 = 0 0 + 9x = 99 + 45 9x = 99 + 45 Combine like terms: 99 + 45 = 144 9x = 144 Divide each side by '9'. x = 16 Simplifying x = 16
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