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Simplifying 3p + r * x = 7r + -21p Multiply r * x 3p + rx = 7r + -21p Reorder the terms: 3p + rx = -21p + 7r Solving 3p + rx = -21p + 7r Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '21p' to each side of the equation. 3p + 21p + rx = -21p + 21p + 7r Combine like terms: 3p + 21p = 24p 24p + rx = -21p + 21p + 7r Combine like terms: -21p + 21p = 0 24p + rx = 0 + 7r 24p + rx = 7r Add '-1rx' to each side of the equation. 24p + rx + -1rx = 7r + -1rx Combine like terms: rx + -1rx = 0 24p + 0 = 7r + -1rx 24p = 7r + -1rx Divide each side by '24'. p = 0.2916666667r + -0.04166666667rx Simplifying p = 0.2916666667r + -0.04166666667rx
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