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Simplifying 9x + 7 = 91 + -3x Reorder the terms: 7 + 9x = 91 + -3x Solving 7 + 9x = 91 + -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. 7 + 9x + 3x = 91 + -3x + 3x Combine like terms: 9x + 3x = 12x 7 + 12x = 91 + -3x + 3x Combine like terms: -3x + 3x = 0 7 + 12x = 91 + 0 7 + 12x = 91 Add '-7' to each side of the equation. 7 + -7 + 12x = 91 + -7 Combine like terms: 7 + -7 = 0 0 + 12x = 91 + -7 12x = 91 + -7 Combine like terms: 91 + -7 = 84 12x = 84 Divide each side by '12'. x = 7 Simplifying x = 7
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