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Simplifying -7(x + 4) + -13 = 21 Reorder the terms: -7(4 + x) + -13 = 21 (4 * -7 + x * -7) + -13 = 21 (-28 + -7x) + -13 = 21 Reorder the terms: -28 + -13 + -7x = 21 Combine like terms: -28 + -13 = -41 -41 + -7x = 21 Solving -41 + -7x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '41' to each side of the equation. -41 + 41 + -7x = 21 + 41 Combine like terms: -41 + 41 = 0 0 + -7x = 21 + 41 -7x = 21 + 41 Combine like terms: 21 + 41 = 62 -7x = 62 Divide each side by '-7'. x = -8.857142857 Simplifying x = -8.857142857
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