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Simplifying 30x + 100 = 20x + 130 Reorder the terms: 100 + 30x = 20x + 130 Reorder the terms: 100 + 30x = 130 + 20x Solving 100 + 30x = 130 + 20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20x' to each side of the equation. 100 + 30x + -20x = 130 + 20x + -20x Combine like terms: 30x + -20x = 10x 100 + 10x = 130 + 20x + -20x Combine like terms: 20x + -20x = 0 100 + 10x = 130 + 0 100 + 10x = 130 Add '-100' to each side of the equation. 100 + -100 + 10x = 130 + -100 Combine like terms: 100 + -100 = 0 0 + 10x = 130 + -100 10x = 130 + -100 Combine like terms: 130 + -100 = 30 10x = 30 Divide each side by '10'. x = 3 Simplifying x = 3
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