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Simplifying 84 = 7 + -7(x + -3) Reorder the terms: 84 = 7 + -7(-3 + x) 84 = 7 + (-3 * -7 + x * -7) 84 = 7 + (21 + -7x) Combine like terms: 7 + 21 = 28 84 = 28 + -7x Solving 84 = 28 + -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 = 28 + -7x + 7x Combine like terms: -7x + 7x = 0 84 + 7x = 28 + 0 84 + 7x = 28 Add '-84' to each side of the equation. 84 + -84 + 7x = 28 + -84 Combine like terms: 84 + -84 = 0 0 + 7x = 28 + -84 7x = 28 + -84 Combine like terms: 28 + -84 = -56 7x = -56 Divide each side by '7'. x = -8 Simplifying x = -8
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