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Simplifying 8.4 = -12r Solving 8.4 = -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. 8.4 + 12r = -12r + 12r Combine like terms: -12r + 12r = 0 8.4 + 12r = 0 Add '-8.4' to each side of the equation. 8.4 + -8.4 + 12r = 0 + -8.4 Combine like terms: 8.4 + -8.4 = 0.0 0.0 + 12r = 0 + -8.4 12r = 0 + -8.4 Combine like terms: 0 + -8.4 = -8.4 12r = -8.4 Divide each side by '12'. r = -0.7 Simplifying r = -0.7
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