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Simplifying 2 + -2r = 10 + -4r Solving 2 + -2r = 10 + -4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4r' to each side of the equation. 2 + -2r + 4r = 10 + -4r + 4r Combine like terms: -2r + 4r = 2r 2 + 2r = 10 + -4r + 4r Combine like terms: -4r + 4r = 0 2 + 2r = 10 + 0 2 + 2r = 10 Add '-2' to each side of the equation. 2 + -2 + 2r = 10 + -2 Combine like terms: 2 + -2 = 0 0 + 2r = 10 + -2 2r = 10 + -2 Combine like terms: 10 + -2 = 8 2r = 8 Divide each side by '2'. r = 4 Simplifying r = 4
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