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Simplifying (21x + -7) = 8 Reorder the terms: (-7 + 21x) = 8 Remove parenthesis around (-7 + 21x) -7 + 21x = 8 Solving -7 + 21x = 8 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 21x = 8 + 7 Combine like terms: -7 + 7 = 0 0 + 21x = 8 + 7 21x = 8 + 7 Combine like terms: 8 + 7 = 15 21x = 15 Divide each side by '21'. x = 0.7142857143 Simplifying x = 0.7142857143
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