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Simplifying x + (x + -30) + 3x = x Reorder the terms: x + (-30 + x) + 3x = x Remove parenthesis around (-30 + x) x + -30 + x + 3x = x Reorder the terms: -30 + x + x + 3x = x Combine like terms: x + x = 2x -30 + 2x + 3x = x Combine like terms: 2x + 3x = 5x -30 + 5x = x Solving -30 + 5x = x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -30 + 5x + -1x = x + -1x Combine like terms: 5x + -1x = 4x -30 + 4x = x + -1x Combine like terms: x + -1x = 0 -30 + 4x = 0 Add '30' to each side of the equation. -30 + 30 + 4x = 0 + 30 Combine like terms: -30 + 30 = 0 0 + 4x = 0 + 30 4x = 0 + 30 Combine like terms: 0 + 30 = 30 4x = 30 Divide each side by '4'. x = 7.5 Simplifying x = 7.5
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