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Simplifying 6r + 20 + -7r = r + -16 Reorder the terms: 20 + 6r + -7r = r + -16 Combine like terms: 6r + -7r = -1r 20 + -1r = r + -16 Reorder the terms: 20 + -1r = -16 + r Solving 20 + -1r = -16 + 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. 20 + -1r + -1r = -16 + r + -1r Combine like terms: -1r + -1r = -2r 20 + -2r = -16 + r + -1r Combine like terms: r + -1r = 0 20 + -2r = -16 + 0 20 + -2r = -16 Add '-20' to each side of the equation. 20 + -20 + -2r = -16 + -20 Combine like terms: 20 + -20 = 0 0 + -2r = -16 + -20 -2r = -16 + -20 Combine like terms: -16 + -20 = -36 -2r = -36 Divide each side by '-2'. r = 18 Simplifying r = 18
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