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Simplifying 2(4r + -7) + -9 = 0 Reorder the terms: 2(-7 + 4r) + -9 = 0 (-7 * 2 + 4r * 2) + -9 = 0 (-14 + 8r) + -9 = 0 Reorder the terms: -14 + -9 + 8r = 0 Combine like terms: -14 + -9 = -23 -23 + 8r = 0 Solving -23 + 8r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '23' to each side of the equation. -23 + 23 + 8r = 0 + 23 Combine like terms: -23 + 23 = 0 0 + 8r = 0 + 23 8r = 0 + 23 Combine like terms: 0 + 23 = 23 8r = 23 Divide each side by '8'. r = 2.875 Simplifying r = 2.875
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