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