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Simplifying 65 + -4r = 3r + 20 Reorder the terms: 65 + -4r = 20 + 3r Solving 65 + -4r = 20 + 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. 65 + -4r + -3r = 20 + 3r + -3r Combine like terms: -4r + -3r = -7r 65 + -7r = 20 + 3r + -3r Combine like terms: 3r + -3r = 0 65 + -7r = 20 + 0 65 + -7r = 20 Add '-65' to each side of the equation. 65 + -65 + -7r = 20 + -65 Combine like terms: 65 + -65 = 0 0 + -7r = 20 + -65 -7r = 20 + -65 Combine like terms: 20 + -65 = -45 -7r = -45 Divide each side by '-7'. r = 6.428571429 Simplifying r = 6.428571429
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