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Simplifying 15r + -12 = 12r + 3 Reorder the terms: -12 + 15r = 12r + 3 Reorder the terms: -12 + 15r = 3 + 12r Solving -12 + 15r = 3 + 12r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12r' to each side of the equation. -12 + 15r + -12r = 3 + 12r + -12r Combine like terms: 15r + -12r = 3r -12 + 3r = 3 + 12r + -12r Combine like terms: 12r + -12r = 0 -12 + 3r = 3 + 0 -12 + 3r = 3 Add '12' to each side of the equation. -12 + 12 + 3r = 3 + 12 Combine like terms: -12 + 12 = 0 0 + 3r = 3 + 12 3r = 3 + 12 Combine like terms: 3 + 12 = 15 3r = 15 Divide each side by '3'. r = 5 Simplifying r = 5
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