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