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Simplifying 10 = -2 + -3r Solving 10 = -2 + -3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3r' to each side of the equation. 10 + 3r = -2 + -3r + 3r Combine like terms: -3r + 3r = 0 10 + 3r = -2 + 0 10 + 3r = -2 Add '-10' to each side of the equation. 10 + -10 + 3r = -2 + -10 Combine like terms: 10 + -10 = 0 0 + 3r = -2 + -10 3r = -2 + -10 Combine like terms: -2 + -10 = -12 3r = -12 Divide each side by '3'. r = -4 Simplifying r = -4
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