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Simplifying 20 + -8r = -6(2 + 8r) + -8 20 + -8r = (2 * -6 + 8r * -6) + -8 20 + -8r = (-12 + -48r) + -8 Reorder the terms: 20 + -8r = -12 + -8 + -48r Combine like terms: -12 + -8 = -20 20 + -8r = -20 + -48r Solving 20 + -8r = -20 + -48r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '48r' to each side of the equation. 20 + -8r + 48r = -20 + -48r + 48r Combine like terms: -8r + 48r = 40r 20 + 40r = -20 + -48r + 48r Combine like terms: -48r + 48r = 0 20 + 40r = -20 + 0 20 + 40r = -20 Add '-20' to each side of the equation. 20 + -20 + 40r = -20 + -20 Combine like terms: 20 + -20 = 0 0 + 40r = -20 + -20 40r = -20 + -20 Combine like terms: -20 + -20 = -40 40r = -40 Divide each side by '40'. r = -1 Simplifying r = -1
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