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Simplifying 25 = 7(4r + -8) Reorder the terms: 25 = 7(-8 + 4r) 25 = (-8 * 7 + 4r * 7) 25 = (-56 + 28r) Solving 25 = -56 + 28r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-28r' to each side of the equation. 25 + -28r = -56 + 28r + -28r Combine like terms: 28r + -28r = 0 25 + -28r = -56 + 0 25 + -28r = -56 Add '-25' to each side of the equation. 25 + -25 + -28r = -56 + -25 Combine like terms: 25 + -25 = 0 0 + -28r = -56 + -25 -28r = -56 + -25 Combine like terms: -56 + -25 = -81 -28r = -81 Divide each side by '-28'. r = 2.892857143 Simplifying r = 2.892857143
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