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Simplifying -5r + -9 = -9r + 7 Reorder the terms: -9 + -5r = -9r + 7 Reorder the terms: -9 + -5r = 7 + -9r Solving -9 + -5r = 7 + -9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9r' to each side of the equation. -9 + -5r + 9r = 7 + -9r + 9r Combine like terms: -5r + 9r = 4r -9 + 4r = 7 + -9r + 9r Combine like terms: -9r + 9r = 0 -9 + 4r = 7 + 0 -9 + 4r = 7 Add '9' to each side of the equation. -9 + 9 + 4r = 7 + 9 Combine like terms: -9 + 9 = 0 0 + 4r = 7 + 9 4r = 7 + 9 Combine like terms: 7 + 9 = 16 4r = 16 Divide each side by '4'. r = 4 Simplifying r = 4
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