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Simplifying 7x + 30 = 3x + 42 Reorder the terms: 30 + 7x = 3x + 42 Reorder the terms: 30 + 7x = 42 + 3x Solving 30 + 7x = 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 + 7x + -3x = 42 + 3x + -3x Combine like terms: 7x + -3x = 4x 30 + 4x = 42 + 3x + -3x Combine like terms: 3x + -3x = 0 30 + 4x = 42 + 0 30 + 4x = 42 Add '-30' to each side of the equation. 30 + -30 + 4x = 42 + -30 Combine like terms: 30 + -30 = 0 0 + 4x = 42 + -30 4x = 42 + -30 Combine like terms: 42 + -30 = 12 4x = 12 Divide each side by '4'. x = 3 Simplifying x = 3
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