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Simplifying 91 = -3x + 7(2x + 2) Reorder the terms: 91 = -3x + 7(2 + 2x) 91 = -3x + (2 * 7 + 2x * 7) 91 = -3x + (14 + 14x) Reorder the terms: 91 = 14 + -3x + 14x Combine like terms: -3x + 14x = 11x 91 = 14 + 11x Solving 91 = 14 + 11x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11x' to each side of the equation. 91 + -11x = 14 + 11x + -11x Combine like terms: 11x + -11x = 0 91 + -11x = 14 + 0 91 + -11x = 14 Add '-91' to each side of the equation. 91 + -91 + -11x = 14 + -91 Combine like terms: 91 + -91 = 0 0 + -11x = 14 + -91 -11x = 14 + -91 Combine like terms: 14 + -91 = -77 -11x = -77 Divide each side by '-11'. x = 7 Simplifying x = 7
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