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Simplifying x + 30 = 3x + 7 Reorder the terms: 30 + x = 3x + 7 Reorder the terms: 30 + x = 7 + 3x Solving 30 + x = 7 + 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 + x + -3x = 7 + 3x + -3x Combine like terms: x + -3x = -2x 30 + -2x = 7 + 3x + -3x Combine like terms: 3x + -3x = 0 30 + -2x = 7 + 0 30 + -2x = 7 Add '-30' to each side of the equation. 30 + -30 + -2x = 7 + -30 Combine like terms: 30 + -30 = 0 0 + -2x = 7 + -30 -2x = 7 + -30 Combine like terms: 7 + -30 = -23 -2x = -23 Divide each side by '-2'. x = 11.5 Simplifying x = 11.5
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