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Simplifying [7X + -21] = 5 Reorder the terms: [-21 + 7X] = 5 Remove brackets around [-21 + 7X] -21 + 7X = 5 Solving -21 + 7X = 5 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 = 5 + 21 Combine like terms: -21 + 21 = 0 0 + 7X = 5 + 21 7X = 5 + 21 Combine like terms: 5 + 21 = 26 7X = 26 Divide each side by '7'. X = 3.714285714 Simplifying X = 3.714285714
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