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Simplifying -0.3 + -1(1 + -7r) = -5 + 3.7r -0.3 + (1 * -1 + -7r * -1) = -5 + 3.7r -0.3 + (-1 + 7r) = -5 + 3.7r Combine like terms: -0.3 + -1 = -1.3 -1.3 + 7r = -5 + 3.7r Solving -1.3 + 7r = -5 + 3.7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3.7r' to each side of the equation. -1.3 + 7r + -3.7r = -5 + 3.7r + -3.7r Combine like terms: 7r + -3.7r = 3.3r -1.3 + 3.3r = -5 + 3.7r + -3.7r Combine like terms: 3.7r + -3.7r = 0.0 -1.3 + 3.3r = -5 + 0.0 -1.3 + 3.3r = -5 Add '1.3' to each side of the equation. -1.3 + 1.3 + 3.3r = -5 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + 3.3r = -5 + 1.3 3.3r = -5 + 1.3 Combine like terms: -5 + 1.3 = -3.7 3.3r = -3.7 Divide each side by '3.3'. r = -1.121212121 Simplifying r = -1.121212121
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