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Simplifying -4r + -28 = -78 + -1r Reorder the terms: -28 + -4r = -78 + -1r Solving -28 + -4r = -78 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. -28 + -4r + r = -78 + -1r + r Combine like terms: -4r + r = -3r -28 + -3r = -78 + -1r + r Combine like terms: -1r + r = 0 -28 + -3r = -78 + 0 -28 + -3r = -78 Add '28' to each side of the equation. -28 + 28 + -3r = -78 + 28 Combine like terms: -28 + 28 = 0 0 + -3r = -78 + 28 -3r = -78 + 28 Combine like terms: -78 + 28 = -50 -3r = -50 Divide each side by '-3'. r = 16.66666667 Simplifying r = 16.66666667
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