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Simplifying 9x + 42 = 7x + 30 Reorder the terms: 42 + 9x = 7x + 30 Reorder the terms: 42 + 9x = 30 + 7x Solving 42 + 9x = 30 + 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. 42 + 9x + -7x = 30 + 7x + -7x Combine like terms: 9x + -7x = 2x 42 + 2x = 30 + 7x + -7x Combine like terms: 7x + -7x = 0 42 + 2x = 30 + 0 42 + 2x = 30 Add '-42' to each side of the equation. 42 + -42 + 2x = 30 + -42 Combine like terms: 42 + -42 = 0 0 + 2x = 30 + -42 2x = 30 + -42 Combine like terms: 30 + -42 = -12 2x = -12 Divide each side by '2'. x = -6 Simplifying x = -6
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