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Simplifying -91 = -7(x + 7) Reorder the terms: -91 = -7(7 + x) -91 = (7 * -7 + x * -7) -91 = (-49 + -7x) Solving -91 = -49 + -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. -91 + 7x = -49 + -7x + 7x Combine like terms: -7x + 7x = 0 -91 + 7x = -49 + 0 -91 + 7x = -49 Add '91' to each side of the equation. -91 + 91 + 7x = -49 + 91 Combine like terms: -91 + 91 = 0 0 + 7x = -49 + 91 7x = -49 + 91 Combine like terms: -49 + 91 = 42 7x = 42 Divide each side by '7'. x = 6 Simplifying x = 6
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