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Simplifying 40 = -6(5r + -7) Reorder the terms: 40 = -6(-7 + 5r) 40 = (-7 * -6 + 5r * -6) 40 = (42 + -30r) Solving 40 = 42 + -30r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '30r' to each side of the equation. 40 + 30r = 42 + -30r + 30r Combine like terms: -30r + 30r = 0 40 + 30r = 42 + 0 40 + 30r = 42 Add '-40' to each side of the equation. 40 + -40 + 30r = 42 + -40 Combine like terms: 40 + -40 = 0 0 + 30r = 42 + -40 30r = 42 + -40 Combine like terms: 42 + -40 = 2 30r = 2 Divide each side by '30'. r = 0.06666666667 Simplifying r = 0.06666666667
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