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Simplifying 7 + 2r = -7r + -1(1 + -3) Combine like terms: 1 + -3 = -2 7 + 2r = -7r + -1(-2) Multiply -1 * -2 7 + 2r = -7r + 2 Reorder the terms: 7 + 2r = 2 + -7r Solving 7 + 2r = 2 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. 7 + 2r + 7r = 2 + -7r + 7r Combine like terms: 2r + 7r = 9r 7 + 9r = 2 + -7r + 7r Combine like terms: -7r + 7r = 0 7 + 9r = 2 + 0 7 + 9r = 2 Add '-7' to each side of the equation. 7 + -7 + 9r = 2 + -7 Combine like terms: 7 + -7 = 0 0 + 9r = 2 + -7 9r = 2 + -7 Combine like terms: 2 + -7 = -5 9r = -5 Divide each side by '9'. r = -0.5555555556 Simplifying r = -0.5555555556
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