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Simplifying 7x + 13 = 3x + 9 Reorder the terms: 13 + 7x = 3x + 9 Reorder the terms: 13 + 7x = 9 + 3x Solving 13 + 7x = 9 + 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. 13 + 7x + -3x = 9 + 3x + -3x Combine like terms: 7x + -3x = 4x 13 + 4x = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 13 + 4x = 9 + 0 13 + 4x = 9 Add '-13' to each side of the equation. 13 + -13 + 4x = 9 + -13 Combine like terms: 13 + -13 = 0 0 + 4x = 9 + -13 4x = 9 + -13 Combine like terms: 9 + -13 = -4 4x = -4 Divide each side by '4'. x = -1 Simplifying x = -1
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