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Simplifying 4r + -7 + -7r = 5 Reorder the terms: -7 + 4r + -7r = 5 Combine like terms: 4r + -7r = -3r -7 + -3r = 5 Solving -7 + -3r = 5 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -3r = 5 + 7 Combine like terms: -7 + 7 = 0 0 + -3r = 5 + 7 -3r = 5 + 7 Combine like terms: 5 + 7 = 12 -3r = 12 Divide each side by '-3'. r = -4 Simplifying r = -4
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