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Simplifying -2.61 = 1 + -1.3r + 6.4 Reorder the terms: -2.61 = 1 + 6.4 + -1.3r Combine like terms: 1 + 6.4 = 7.4 -2.61 = 7.4 + -1.3r Solving -2.61 = 7.4 + -1.3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1.3r' to each side of the equation. -2.61 + 1.3r = 7.4 + -1.3r + 1.3r Combine like terms: -1.3r + 1.3r = 0.0 -2.61 + 1.3r = 7.4 + 0.0 -2.61 + 1.3r = 7.4 Add '2.61' to each side of the equation. -2.61 + 2.61 + 1.3r = 7.4 + 2.61 Combine like terms: -2.61 + 2.61 = 0.00 0.00 + 1.3r = 7.4 + 2.61 1.3r = 7.4 + 2.61 Combine like terms: 7.4 + 2.61 = 10.01 1.3r = 10.01 Divide each side by '1.3'. r = 7.7 Simplifying r = 7.7
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