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Simplifying 4r + 9 = -7 Reorder the terms: 9 + 4r = -7 Solving 9 + 4r = -7 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. 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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