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Simplifying -3r + 15 = (r + -2) Reorder the terms: 15 + -3r = (r + -2) Reorder the terms: 15 + -3r = (-2 + r) Remove parenthesis around (-2 + r) 15 + -3r = -2 + r Solving 15 + -3r = -2 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 15 + -3r + -1r = -2 + r + -1r Combine like terms: -3r + -1r = -4r 15 + -4r = -2 + r + -1r Combine like terms: r + -1r = 0 15 + -4r = -2 + 0 15 + -4r = -2 Add '-15' to each side of the equation. 15 + -15 + -4r = -2 + -15 Combine like terms: 15 + -15 = 0 0 + -4r = -2 + -15 -4r = -2 + -15 Combine like terms: -2 + -15 = -17 -4r = -17 Divide each side by '-4'. r = 4.25 Simplifying r = 4.25
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