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Simplifying -4r + 3 = -15 + -7r Reorder the terms: 3 + -4r = -15 + -7r Solving 3 + -4r = -15 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. 3 + -4r + 7r = -15 + -7r + 7r Combine like terms: -4r + 7r = 3r 3 + 3r = -15 + -7r + 7r Combine like terms: -7r + 7r = 0 3 + 3r = -15 + 0 3 + 3r = -15 Add '-3' to each side of the equation. 3 + -3 + 3r = -15 + -3 Combine like terms: 3 + -3 = 0 0 + 3r = -15 + -3 3r = -15 + -3 Combine like terms: -15 + -3 = -18 3r = -18 Divide each side by '3'. r = -6 Simplifying r = -6
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