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Simplifying -5(5r + 4) + 2r = 88 Reorder the terms: -5(4 + 5r) + 2r = 88 (4 * -5 + 5r * -5) + 2r = 88 (-20 + -25r) + 2r = 88 Combine like terms: -25r + 2r = -23r -20 + -23r = 88 Solving -20 + -23r = 88 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -23r = 88 + 20 Combine like terms: -20 + 20 = 0 0 + -23r = 88 + 20 -23r = 88 + 20 Combine like terms: 88 + 20 = 108 -23r = 108 Divide each side by '-23'. r = -4.695652174 Simplifying r = -4.695652174
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