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Simplifying 5x + 2 + 7x = 86 Reorder the terms: 2 + 5x + 7x = 86 Combine like terms: 5x + 7x = 12x 2 + 12x = 86 Solving 2 + 12x = 86 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 12x = 86 + -2 Combine like terms: 2 + -2 = 0 0 + 12x = 86 + -2 12x = 86 + -2 Combine like terms: 86 + -2 = 84 12x = 84 Divide each side by '12'. x = 7 Simplifying x = 7
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