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Simplifying 12 + -1r7 = 3 Solving 12 + -1r7 = 3 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1r7 = 3 + -12 Combine like terms: 12 + -12 = 0 0 + -1r7 = 3 + -12 -1r7 = 3 + -12 Combine like terms: 3 + -12 = -9 -1r7 = -9 Divide each side by '-1'. r7 = 9 Simplifying r7 = 9 Reorder the terms: -9 + r7 = 9 + -9 Combine like terms: 9 + -9 = 0 -9 + r7 = 0 The solution to this equation could not be determined.
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