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Simplifying -7 = -1(x + 4) Reorder the terms: -7 = -1(4 + x) -7 = (4 * -1 + x * -1) -7 = (-4 + -1x) Solving -7 = -4 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. -7 + x = -4 + -1x + x Combine like terms: -1x + x = 0 -7 + x = -4 + 0 -7 + x = -4 Add '7' to each side of the equation. -7 + 7 + x = -4 + 7 Combine like terms: -7 + 7 = 0 0 + x = -4 + 7 x = -4 + 7 Combine like terms: -4 + 7 = 3 x = 3 Simplifying x = 3
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