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Simplifying 12r + -25 = 4r + 7 Reorder the terms: -25 + 12r = 4r + 7 Reorder the terms: -25 + 12r = 7 + 4r Solving -25 + 12r = 7 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -25 + 12r + -4r = 7 + 4r + -4r Combine like terms: 12r + -4r = 8r -25 + 8r = 7 + 4r + -4r Combine like terms: 4r + -4r = 0 -25 + 8r = 7 + 0 -25 + 8r = 7 Add '25' to each side of the equation. -25 + 25 + 8r = 7 + 25 Combine like terms: -25 + 25 = 0 0 + 8r = 7 + 25 8r = 7 + 25 Combine like terms: 7 + 25 = 32 8r = 32 Divide each side by '8'. r = 4 Simplifying r = 4
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