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Simplifying rx2 + -7tx + 4 = 0 Reorder the terms: 4 + rx2 + -7tx = 0 Solving 4 + rx2 + -7tx = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + rx2 + -4 + -7tx = 0 + -4 Reorder the terms: 4 + -4 + rx2 + -7tx = 0 + -4 Combine like terms: 4 + -4 = 0 0 + rx2 + -7tx = 0 + -4 rx2 + -7tx = 0 + -4 Combine like terms: 0 + -4 = -4 rx2 + -7tx = -4 Add '7tx' to each side of the equation. rx2 + -7tx + 7tx = -4 + 7tx Combine like terms: -7tx + 7tx = 0 rx2 + 0 = -4 + 7tx rx2 = -4 + 7tx Divide each side by 'x2'. r = -4x-2 + 7tx-1 Simplifying r = -4x-2 + 7tx-1 Reorder the terms: r = 7tx-1 + -4x-2
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