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