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Simplifying 4 + -5r + -7 = 0 Reorder the terms: 4 + -7 + -5r = 0 Combine like terms: 4 + -7 = -3 -3 + -5r = 0 Solving -3 + -5r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -5r = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -5r = 0 + 3 -5r = 0 + 3 Combine like terms: 0 + 3 = 3 -5r = 3 Divide each side by '-5'. r = -0.6 Simplifying r = -0.6
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