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Simplifying (4x + -15) = (x + 30) Reorder the terms: (-15 + 4x) = (x + 30) Remove parenthesis around (-15 + 4x) -15 + 4x = (x + 30) Reorder the terms: -15 + 4x = (30 + x) Remove parenthesis around (30 + x) -15 + 4x = 30 + x Solving -15 + 4x = 30 + 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. -15 + 4x + -1x = 30 + x + -1x Combine like terms: 4x + -1x = 3x -15 + 3x = 30 + x + -1x Combine like terms: x + -1x = 0 -15 + 3x = 30 + 0 -15 + 3x = 30 Add '15' to each side of the equation. -15 + 15 + 3x = 30 + 15 Combine like terms: -15 + 15 = 0 0 + 3x = 30 + 15 3x = 30 + 15 Combine like terms: 30 + 15 = 45 3x = 45 Divide each side by '3'. x = 15 Simplifying x = 15
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