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Simplifying 12 = 5r + 7 Reorder the terms: 12 = 7 + 5r Solving 12 = 7 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. 12 + -5r = 7 + 5r + -5r Combine like terms: 5r + -5r = 0 12 + -5r = 7 + 0 12 + -5r = 7 Add '-12' to each side of the equation. 12 + -12 + -5r = 7 + -12 Combine like terms: 12 + -12 = 0 0 + -5r = 7 + -12 -5r = 7 + -12 Combine like terms: 7 + -12 = -5 -5r = -5 Divide each side by '-5'. r = 1 Simplifying r = 1
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