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Simplifying 9x + 30 = 3x + 42 Reorder the terms: 30 + 9x = 3x + 42 Reorder the terms: 30 + 9x = 42 + 3x Solving 30 + 9x = 42 + 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. 30 + 9x + -3x = 42 + 3x + -3x Combine like terms: 9x + -3x = 6x 30 + 6x = 42 + 3x + -3x Combine like terms: 3x + -3x = 0 30 + 6x = 42 + 0 30 + 6x = 42 Add '-30' to each side of the equation. 30 + -30 + 6x = 42 + -30 Combine like terms: 30 + -30 = 0 0 + 6x = 42 + -30 6x = 42 + -30 Combine like terms: 42 + -30 = 12 6x = 12 Divide each side by '6'. x = 2 Simplifying x = 2
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