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Simplifying 7 + -4(1 + 5.5r) = -30.5 7 + (1 * -4 + 5.5r * -4) = -30.5 7 + (-4 + -22r) = -30.5 Combine like terms: 7 + -4 = 3 3 + -22r = -30.5 Solving 3 + -22r = -30.5 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -22r = -30.5 + -3 Combine like terms: 3 + -3 = 0 0 + -22r = -30.5 + -3 -22r = -30.5 + -3 Combine like terms: -30.5 + -3 = -33.5 -22r = -33.5 Divide each side by '-22'. r = 1.522727273 Simplifying r = 1.522727273
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