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Simplifying 7(x + -3) = 81 Reorder the terms: 7(-3 + x) = 81 (-3 * 7 + x * 7) = 81 (-21 + 7x) = 81 Solving -21 + 7x = 81 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 7x = 81 + 21 Combine like terms: -21 + 21 = 0 0 + 7x = 81 + 21 7x = 81 + 21 Combine like terms: 81 + 21 = 102 7x = 102 Divide each side by '7'. x = 14.57142857 Simplifying x = 14.57142857
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