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Simplifying -8(r + 4) + 8 = -1r + 25 Reorder the terms: -8(4 + r) + 8 = -1r + 25 (4 * -8 + r * -8) + 8 = -1r + 25 (-32 + -8r) + 8 = -1r + 25 Reorder the terms: -32 + 8 + -8r = -1r + 25 Combine like terms: -32 + 8 = -24 -24 + -8r = -1r + 25 Reorder the terms: -24 + -8r = 25 + -1r Solving -24 + -8r = 25 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. -24 + -8r + r = 25 + -1r + r Combine like terms: -8r + r = -7r -24 + -7r = 25 + -1r + r Combine like terms: -1r + r = 0 -24 + -7r = 25 + 0 -24 + -7r = 25 Add '24' to each side of the equation. -24 + 24 + -7r = 25 + 24 Combine like terms: -24 + 24 = 0 0 + -7r = 25 + 24 -7r = 25 + 24 Combine like terms: 25 + 24 = 49 -7r = 49 Divide each side by '-7'. r = -7 Simplifying r = -7
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