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Simplifying -8(5r + 5) = 240 Reorder the terms: -8(5 + 5r) = 240 (5 * -8 + 5r * -8) = 240 (-40 + -40r) = 240 Solving -40 + -40r = 240 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '40' to each side of the equation. -40 + 40 + -40r = 240 + 40 Combine like terms: -40 + 40 = 0 0 + -40r = 240 + 40 -40r = 240 + 40 Combine like terms: 240 + 40 = 280 -40r = 280 Divide each side by '-40'. r = -7 Simplifying r = -7
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