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Simplifying x + 1(x + -7) = 85 Reorder the terms: x + 1(-7 + x) = 85 x + (-7 * 1 + x * 1) = 85 x + (-7 + 1x) = 85 Reorder the terms: -7 + x + 1x = 85 Combine like terms: x + 1x = 2x -7 + 2x = 85 Solving -7 + 2x = 85 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 2x = 85 + 7 Combine like terms: -7 + 7 = 0 0 + 2x = 85 + 7 2x = 85 + 7 Combine like terms: 85 + 7 = 92 2x = 92 Divide each side by '2'. x = 46 Simplifying x = 46
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