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Simplifying -7(7 + x) = -28 + -4x (7 * -7 + x * -7) = -28 + -4x (-49 + -7x) = -28 + -4x Solving -49 + -7x = -28 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. -49 + -7x + 4x = -28 + -4x + 4x Combine like terms: -7x + 4x = -3x -49 + -3x = -28 + -4x + 4x Combine like terms: -4x + 4x = 0 -49 + -3x = -28 + 0 -49 + -3x = -28 Add '49' to each side of the equation. -49 + 49 + -3x = -28 + 49 Combine like terms: -49 + 49 = 0 0 + -3x = -28 + 49 -3x = -28 + 49 Combine like terms: -28 + 49 = 21 -3x = 21 Divide each side by '-3'. x = -7 Simplifying x = -7
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