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Simplifying 7x + 30 = 4x + 81 Reorder the terms: 30 + 7x = 4x + 81 Reorder the terms: 30 + 7x = 81 + 4x Solving 30 + 7x = 81 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 30 + 7x + -4x = 81 + 4x + -4x Combine like terms: 7x + -4x = 3x 30 + 3x = 81 + 4x + -4x Combine like terms: 4x + -4x = 0 30 + 3x = 81 + 0 30 + 3x = 81 Add '-30' to each side of the equation. 30 + -30 + 3x = 81 + -30 Combine like terms: 30 + -30 = 0 0 + 3x = 81 + -30 3x = 81 + -30 Combine like terms: 81 + -30 = 51 3x = 51 Divide each side by '3'. x = 17 Simplifying x = 17
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