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Simplifying 5r + -9 = 4r + -7 Reorder the terms: -9 + 5r = 4r + -7 Reorder the terms: -9 + 5r = -7 + 4r Solving -9 + 5r = -7 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -9 + 5r + -4r = -7 + 4r + -4r Combine like terms: 5r + -4r = 1r -9 + 1r = -7 + 4r + -4r Combine like terms: 4r + -4r = 0 -9 + 1r = -7 + 0 -9 + 1r = -7 Add '9' to each side of the equation. -9 + 9 + 1r = -7 + 9 Combine like terms: -9 + 9 = 0 0 + 1r = -7 + 9 1r = -7 + 9 Combine like terms: -7 + 9 = 2 1r = 2 Divide each side by '1'. r = 2 Simplifying r = 2
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