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Simplifying 8r + -3 = -7 + 7r Reorder the terms: -3 + 8r = -7 + 7r Solving -3 + 8r = -7 + 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 + 8r + -7r = -7 + 7r + -7r Combine like terms: 8r + -7r = 1r -3 + 1r = -7 + 7r + -7r Combine like terms: 7r + -7r = 0 -3 + 1r = -7 + 0 -3 + 1r = -7 Add '3' to each side of the equation. -3 + 3 + 1r = -7 + 3 Combine like terms: -3 + 3 = 0 0 + 1r = -7 + 3 1r = -7 + 3 Combine like terms: -7 + 3 = -4 1r = -4 Divide each side by '1'. r = -4 Simplifying r = -4
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