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Simplifying -8(4r + -7) = -200 Reorder the terms: -8(-7 + 4r) = -200 (-7 * -8 + 4r * -8) = -200 (56 + -32r) = -200 Solving 56 + -32r = -200 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-56' to each side of the equation. 56 + -56 + -32r = -200 + -56 Combine like terms: 56 + -56 = 0 0 + -32r = -200 + -56 -32r = -200 + -56 Combine like terms: -200 + -56 = -256 -32r = -256 Divide each side by '-32'. r = 8 Simplifying r = 8
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