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Simplifying x * 7 + 28 = x * 3 + 72 Reorder the terms for easier multiplication: 7x + 28 = x * 3 + 72 Reorder the terms: 28 + 7x = x * 3 + 72 Reorder the terms for easier multiplication: 28 + 7x = 3x + 72 Reorder the terms: 28 + 7x = 72 + 3x Solving 28 + 7x = 72 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 28 + 7x + -3x = 72 + 3x + -3x Combine like terms: 7x + -3x = 4x 28 + 4x = 72 + 3x + -3x Combine like terms: 3x + -3x = 0 28 + 4x = 72 + 0 28 + 4x = 72 Add '-28' to each side of the equation. 28 + -28 + 4x = 72 + -28 Combine like terms: 28 + -28 = 0 0 + 4x = 72 + -28 4x = 72 + -28 Combine like terms: 72 + -28 = 44 4x = 44 Divide each side by '4'. x = 11 Simplifying x = 11
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