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Simplifying 16 + -8r = -2(1 + 7r) 16 + -8r = (1 * -2 + 7r * -2) 16 + -8r = (-2 + -14r) Solving 16 + -8r = -2 + -14r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '14r' to each side of the equation. 16 + -8r + 14r = -2 + -14r + 14r Combine like terms: -8r + 14r = 6r 16 + 6r = -2 + -14r + 14r Combine like terms: -14r + 14r = 0 16 + 6r = -2 + 0 16 + 6r = -2 Add '-16' to each side of the equation. 16 + -16 + 6r = -2 + -16 Combine like terms: 16 + -16 = 0 0 + 6r = -2 + -16 6r = -2 + -16 Combine like terms: -2 + -16 = -18 6r = -18 Divide each side by '6'. r = -3 Simplifying r = -3
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