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Simplifying 13x + 15 = 3x + 215 Reorder the terms: 15 + 13x = 3x + 215 Reorder the terms: 15 + 13x = 215 + 3x Solving 15 + 13x = 215 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 15 + 13x + -3x = 215 + 3x + -3x Combine like terms: 13x + -3x = 10x 15 + 10x = 215 + 3x + -3x Combine like terms: 3x + -3x = 0 15 + 10x = 215 + 0 15 + 10x = 215 Add '-15' to each side of the equation. 15 + -15 + 10x = 215 + -15 Combine like terms: 15 + -15 = 0 0 + 10x = 215 + -15 10x = 215 + -15 Combine like terms: 215 + -15 = 200 10x = 200 Divide each side by '10'. x = 20 Simplifying x = 20
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