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Simplifying -1(x + 7) = -42 Reorder the terms: -1(7 + x) = -42 (7 * -1 + x * -1) = -42 (-7 + -1x) = -42 Solving -7 + -1x = -42 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 + -1x = -42 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = -42 + 7 -1x = -42 + 7 Combine like terms: -42 + 7 = -35 -1x = -35 Divide each side by '-1'. x = 35 Simplifying x = 35
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