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Simplifying 12X + -15 = 7X + 20 Reorder the terms: -15 + 12X = 7X + 20 Reorder the terms: -15 + 12X = 20 + 7X Solving -15 + 12X = 20 + 7X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7X' to each side of the equation. -15 + 12X + -7X = 20 + 7X + -7X Combine like terms: 12X + -7X = 5X -15 + 5X = 20 + 7X + -7X Combine like terms: 7X + -7X = 0 -15 + 5X = 20 + 0 -15 + 5X = 20 Add '15' to each side of the equation. -15 + 15 + 5X = 20 + 15 Combine like terms: -15 + 15 = 0 0 + 5X = 20 + 15 5X = 20 + 15 Combine like terms: 20 + 15 = 35 5X = 35 Divide each side by '5'. X = 7 Simplifying X = 7
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