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Simplifying 3r + -19 = -7 + r Reorder the terms: -19 + 3r = -7 + r Solving -19 + 3r = -7 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -19 + 3r + -1r = -7 + r + -1r Combine like terms: 3r + -1r = 2r -19 + 2r = -7 + r + -1r Combine like terms: r + -1r = 0 -19 + 2r = -7 + 0 -19 + 2r = -7 Add '19' to each side of the equation. -19 + 19 + 2r = -7 + 19 Combine like terms: -19 + 19 = 0 0 + 2r = -7 + 19 2r = -7 + 19 Combine like terms: -7 + 19 = 12 2r = 12 Divide each side by '2'. r = 6 Simplifying r = 6
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