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Simplifying 10 = 3r + 7 Reorder the terms: 10 = 7 + 3r Solving 10 = 7 + 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 = 7 + 3r + -3r Combine like terms: 3r + -3r = 0 10 + -3r = 7 + 0 10 + -3r = 7 Add '-10' to each side of the equation. 10 + -10 + -3r = 7 + -10 Combine like terms: 10 + -10 = 0 0 + -3r = 7 + -10 -3r = 7 + -10 Combine like terms: 7 + -10 = -3 -3r = -3 Divide each side by '-3'. r = 1 Simplifying r = 1
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