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Simplifying x + x + x + 1 + x + 2 = 87 Reorder the terms: 1 + 2 + x + x + x + x = 87 Combine like terms: 1 + 2 = 3 3 + x + x + x + x = 87 Combine like terms: x + x = 2x 3 + 2x + x + x = 87 Combine like terms: 2x + x = 3x 3 + 3x + x = 87 Combine like terms: 3x + x = 4x 3 + 4x = 87 Solving 3 + 4x = 87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 4x = 87 + -3 Combine like terms: 3 + -3 = 0 0 + 4x = 87 + -3 4x = 87 + -3 Combine like terms: 87 + -3 = 84 4x = 84 Divide each side by '4'. x = 21 Simplifying x = 21
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