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Simplifying -4 + -7r = -16 + -5r + r Combine like terms: -5r + r = -4r -4 + -7r = -16 + -4r Solving -4 + -7r = -16 + -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. -4 + -7r + 4r = -16 + -4r + 4r Combine like terms: -7r + 4r = -3r -4 + -3r = -16 + -4r + 4r Combine like terms: -4r + 4r = 0 -4 + -3r = -16 + 0 -4 + -3r = -16 Add '4' to each side of the equation. -4 + 4 + -3r = -16 + 4 Combine like terms: -4 + 4 = 0 0 + -3r = -16 + 4 -3r = -16 + 4 Combine like terms: -16 + 4 = -12 -3r = -12 Divide each side by '-3'. r = 4 Simplifying r = 4
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