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