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Simplifying 6 + -12r = 42 Solving 6 + -12r = 42 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -12r = 42 + -6 Combine like terms: 6 + -6 = 0 0 + -12r = 42 + -6 -12r = 42 + -6 Combine like terms: 42 + -6 = 36 -12r = 36 Divide each side by '-12'. r = -3 Simplifying r = -3
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