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Simplifying 2r + -2 = -2 + 7r Reorder the terms: -2 + 2r = -2 + 7r Add '2' to each side of the equation. -2 + 2 + 2r = -2 + 2 + 7r Combine like terms: -2 + 2 = 0 0 + 2r = -2 + 2 + 7r 2r = -2 + 2 + 7r Combine like terms: -2 + 2 = 0 2r = 0 + 7r 2r = 7r Solving 2r = 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. 2r + -7r = 7r + -7r Combine like terms: 2r + -7r = -5r -5r = 7r + -7r Combine like terms: 7r + -7r = 0 -5r = 0 Divide each side by '-5'. r = 0 Simplifying r = 0
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