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Simplifying 9r = 5r + -2(2 + 3r) 9r = 5r + (2 * -2 + 3r * -2) 9r = 5r + (-4 + -6r) Reorder the terms: 9r = -4 + 5r + -6r Combine like terms: 5r + -6r = -1r 9r = -4 + -1r Solving 9r = -4 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. 9r + r = -4 + -1r + r Combine like terms: 9r + r = 10r 10r = -4 + -1r + r Combine like terms: -1r + r = 0 10r = -4 + 0 10r = -4 Divide each side by '10'. r = -0.4 Simplifying r = -0.4
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