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Simplifying 8 + -2(r + -2) = 11 Reorder the terms: 8 + -2(-2 + r) = 11 8 + (-2 * -2 + r * -2) = 11 8 + (4 + -2r) = 11 Combine like terms: 8 + 4 = 12 12 + -2r = 11 Solving 12 + -2r = 11 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -2r = 11 + -12 Combine like terms: 12 + -12 = 0 0 + -2r = 11 + -12 -2r = 11 + -12 Combine like terms: 11 + -12 = -1 -2r = -1 Divide each side by '-2'. r = 0.5 Simplifying r = 0.5
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