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Simplifying 2x + 7(2x + -3) = 91 Reorder the terms: 2x + 7(-3 + 2x) = 91 2x + (-3 * 7 + 2x * 7) = 91 2x + (-21 + 14x) = 91 Reorder the terms: -21 + 2x + 14x = 91 Combine like terms: 2x + 14x = 16x -21 + 16x = 91 Solving -21 + 16x = 91 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 16x = 91 + 21 Combine like terms: -21 + 21 = 0 0 + 16x = 91 + 21 16x = 91 + 21 Combine like terms: 91 + 21 = 112 16x = 112 Divide each side by '16'. x = 7 Simplifying x = 7
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