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Simplifying 7r + -10 = 3r + 30 Reorder the terms: -10 + 7r = 3r + 30 Reorder the terms: -10 + 7r = 30 + 3r Solving -10 + 7r = 30 + 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 + 7r + -3r = 30 + 3r + -3r Combine like terms: 7r + -3r = 4r -10 + 4r = 30 + 3r + -3r Combine like terms: 3r + -3r = 0 -10 + 4r = 30 + 0 -10 + 4r = 30 Add '10' to each side of the equation. -10 + 10 + 4r = 30 + 10 Combine like terms: -10 + 10 = 0 0 + 4r = 30 + 10 4r = 30 + 10 Combine like terms: 30 + 10 = 40 4r = 40 Divide each side by '4'. r = 10 Simplifying r = 10
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