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Simplifying -2 + -5(1 + 7r) = -23 -2 + (1 * -5 + 7r * -5) = -23 -2 + (-5 + -35r) = -23 Combine like terms: -2 + -5 = -7 -7 + -35r = -23 Solving -7 + -35r = -23 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -35r = -23 + 7 Combine like terms: -7 + 7 = 0 0 + -35r = -23 + 7 -35r = -23 + 7 Combine like terms: -23 + 7 = -16 -35r = -16 Divide each side by '-35'. r = 0.4571428571 Simplifying r = 0.4571428571
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