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Simplifying 3r + -7 = 13 + 2r Reorder the terms: -7 + 3r = 13 + 2r Solving -7 + 3r = 13 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -7 + 3r + -2r = 13 + 2r + -2r Combine like terms: 3r + -2r = 1r -7 + 1r = 13 + 2r + -2r Combine like terms: 2r + -2r = 0 -7 + 1r = 13 + 0 -7 + 1r = 13 Add '7' to each side of the equation. -7 + 7 + 1r = 13 + 7 Combine like terms: -7 + 7 = 0 0 + 1r = 13 + 7 1r = 13 + 7 Combine like terms: 13 + 7 = 20 1r = 20 Divide each side by '1'. r = 20 Simplifying r = 20
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