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Simplifying 30x + 90 = 20x + 100 Reorder the terms: 90 + 30x = 20x + 100 Reorder the terms: 90 + 30x = 100 + 20x Solving 90 + 30x = 100 + 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. 90 + 30x + -20x = 100 + 20x + -20x Combine like terms: 30x + -20x = 10x 90 + 10x = 100 + 20x + -20x Combine like terms: 20x + -20x = 0 90 + 10x = 100 + 0 90 + 10x = 100 Add '-90' to each side of the equation. 90 + -90 + 10x = 100 + -90 Combine like terms: 90 + -90 = 0 0 + 10x = 100 + -90 10x = 100 + -90 Combine like terms: 100 + -90 = 10 10x = 10 Divide each side by '10'. x = 1 Simplifying x = 1
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