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Simplifying -3(x + 7) = -42 Reorder the terms: -3(7 + x) = -42 (7 * -3 + x * -3) = -42 (-21 + -3x) = -42 Solving -21 + -3x = -42 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 + -3x = -42 + 21 Combine like terms: -21 + 21 = 0 0 + -3x = -42 + 21 -3x = -42 + 21 Combine like terms: -42 + 21 = -21 -3x = -21 Divide each side by '-3'. x = 7 Simplifying x = 7
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