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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: 3x + x = 4x -30 + 2x = 4x Solving -30 + 2x = 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 + 2x + -4x = 4x + -4x Combine like terms: 2x + -4x = -2x -30 + -2x = 4x + -4x Combine like terms: 4x + -4x = 0 -30 + -2x = 0 Add '30' to each side of the equation. -30 + 30 + -2x = 0 + 30 Combine like terms: -30 + 30 = 0 0 + -2x = 0 + 30 -2x = 0 + 30 Combine like terms: 0 + 30 = 30 -2x = 30 Divide each side by '-2'. x = -15 Simplifying x = -15
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