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Simplifying -4.5 + -2.5 = -4r + -12 Combine like terms: -4.5 + -2.5 = -7 -7 = -4r + -12 Reorder the terms: -7 = -12 + -4r Solving -7 = -12 + -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. -7 + 4r = -12 + -4r + 4r Combine like terms: -4r + 4r = 0 -7 + 4r = -12 + 0 -7 + 4r = -12 Add '7' to each side of the equation. -7 + 7 + 4r = -12 + 7 Combine like terms: -7 + 7 = 0 0 + 4r = -12 + 7 4r = -12 + 7 Combine like terms: -12 + 7 = -5 4r = -5 Divide each side by '4'. r = -1.25 Simplifying r = -1.25
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