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Simplifying 2 + -1(4r + 7) = -25 Reorder the terms: 2 + -1(7 + 4r) = -25 2 + (7 * -1 + 4r * -1) = -25 2 + (-7 + -4r) = -25 Combine like terms: 2 + -7 = -5 -5 + -4r = -25 Solving -5 + -4r = -25 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -4r = -25 + 5 Combine like terms: -5 + 5 = 0 0 + -4r = -25 + 5 -4r = -25 + 5 Combine like terms: -25 + 5 = -20 -4r = -20 Divide each side by '-4'. r = 5 Simplifying r = 5
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