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Simplifying -7 = -8 + -12r Solving -7 = -8 + -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. -7 + 12r = -8 + -12r + 12r Combine like terms: -12r + 12r = 0 -7 + 12r = -8 + 0 -7 + 12r = -8 Add '7' to each side of the equation. -7 + 7 + 12r = -8 + 7 Combine like terms: -7 + 7 = 0 0 + 12r = -8 + 7 12r = -8 + 7 Combine like terms: -8 + 7 = -1 12r = -1 Divide each side by '12'. r = -0.08333333333 Simplifying r = -0.08333333333
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