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Simplifying -7(8r + 1) + -4r = -187 Reorder the terms: -7(1 + 8r) + -4r = -187 (1 * -7 + 8r * -7) + -4r = -187 (-7 + -56r) + -4r = -187 Combine like terms: -56r + -4r = -60r -7 + -60r = -187 Solving -7 + -60r = -187 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -60r = -187 + 7 Combine like terms: -7 + 7 = 0 0 + -60r = -187 + 7 -60r = -187 + 7 Combine like terms: -187 + 7 = -180 -60r = -180 Divide each side by '-60'. r = 3 Simplifying r = 3
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