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Simplifying 5(-5r + -7) + -2 = -87 Reorder the terms: 5(-7 + -5r) + -2 = -87 (-7 * 5 + -5r * 5) + -2 = -87 (-35 + -25r) + -2 = -87 Reorder the terms: -35 + -2 + -25r = -87 Combine like terms: -35 + -2 = -37 -37 + -25r = -87 Solving -37 + -25r = -87 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '37' to each side of the equation. -37 + 37 + -25r = -87 + 37 Combine like terms: -37 + 37 = 0 0 + -25r = -87 + 37 -25r = -87 + 37 Combine like terms: -87 + 37 = -50 -25r = -50 Divide each side by '-25'. r = 2 Simplifying r = 2
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