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Simplifying -10 + -2r = 13 + 2r Solving -10 + -2r = 13 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -10 + -2r + -2r = 13 + 2r + -2r Combine like terms: -2r + -2r = -4r -10 + -4r = 13 + 2r + -2r Combine like terms: 2r + -2r = 0 -10 + -4r = 13 + 0 -10 + -4r = 13 Add '10' to each side of the equation. -10 + 10 + -4r = 13 + 10 Combine like terms: -10 + 10 = 0 0 + -4r = 13 + 10 -4r = 13 + 10 Combine like terms: 13 + 10 = 23 -4r = 23 Divide each side by '-4'. r = -5.75 Simplifying r = -5.75
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