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Simplifying 8x + 5x + -30 = 12 Reorder the terms: -30 + 8x + 5x = 12 Combine like terms: 8x + 5x = 13x -30 + 13x = 12 Solving -30 + 13x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 13x = 12 + 30 Combine like terms: -30 + 30 = 0 0 + 13x = 12 + 30 13x = 12 + 30 Combine like terms: 12 + 30 = 42 13x = 42 Divide each side by '13'. x = 3.230769231 Simplifying x = 3.230769231
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