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Simplifying 0.80r + 0.40 = 780 Reorder the terms: 0.40 + 0.80r = 780 Solving 0.40 + 0.80r = 780 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-0.40' to each side of the equation. 0.40 + -0.40 + 0.80r = 780 + -0.40 Combine like terms: 0.40 + -0.40 = 0.00 0.00 + 0.80r = 780 + -0.40 0.80r = 780 + -0.40 Combine like terms: 780 + -0.40 = 779.6 0.80r = 779.6 Divide each side by '0.80'. r = 974.5 Simplifying r = 974.5
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