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Simplifying -28 = -7(x + 1) Reorder the terms: -28 = -7(1 + x) -28 = (1 * -7 + x * -7) -28 = (-7 + -7x) Solving -28 = -7 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. -28 + 7x = -7 + -7x + 7x Combine like terms: -7x + 7x = 0 -28 + 7x = -7 + 0 -28 + 7x = -7 Add '28' to each side of the equation. -28 + 28 + 7x = -7 + 28 Combine like terms: -28 + 28 = 0 0 + 7x = -7 + 28 7x = -7 + 28 Combine like terms: -7 + 28 = 21 7x = 21 Divide each side by '7'. x = 3 Simplifying x = 3
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