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Simplifying 3x + -2(-2x + -7) = 91 Reorder the terms: 3x + -2(-7 + -2x) = 91 3x + (-7 * -2 + -2x * -2) = 91 3x + (14 + 4x) = 91 Reorder the terms: 14 + 3x + 4x = 91 Combine like terms: 3x + 4x = 7x 14 + 7x = 91 Solving 14 + 7x = 91 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + 7x = 91 + -14 Combine like terms: 14 + -14 = 0 0 + 7x = 91 + -14 7x = 91 + -14 Combine like terms: 91 + -14 = 77 7x = 77 Divide each side by '7'. x = 11 Simplifying x = 11
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