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Simplifying 84 = -7(x + -7) Reorder the terms: 84 = -7(-7 + x) 84 = (-7 * -7 + x * -7) 84 = (49 + -7x) Solving 84 = 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. 84 + 7x = 49 + -7x + 7x Combine like terms: -7x + 7x = 0 84 + 7x = 49 + 0 84 + 7x = 49 Add '-84' to each side of the equation. 84 + -84 + 7x = 49 + -84 Combine like terms: 84 + -84 = 0 0 + 7x = 49 + -84 7x = 49 + -84 Combine like terms: 49 + -84 = -35 7x = -35 Divide each side by '7'. x = -5 Simplifying x = -5
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