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Simplifying 7x + 30 = 9x + 42 Reorder the terms: 30 + 7x = 9x + 42 Reorder the terms: 30 + 7x = 42 + 9x Solving 30 + 7x = 42 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 30 + 7x + -9x = 42 + 9x + -9x Combine like terms: 7x + -9x = -2x 30 + -2x = 42 + 9x + -9x Combine like terms: 9x + -9x = 0 30 + -2x = 42 + 0 30 + -2x = 42 Add '-30' to each side of the equation. 30 + -30 + -2x = 42 + -30 Combine like terms: 30 + -30 = 0 0 + -2x = 42 + -30 -2x = 42 + -30 Combine like terms: 42 + -30 = 12 -2x = 12 Divide each side by '-2'. x = -6 Simplifying x = -6
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