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Simplifying -40 = -4 + 4(r + 2) Reorder the terms: -40 = -4 + 4(2 + r) -40 = -4 + (2 * 4 + r * 4) -40 = -4 + (8 + 4r) Combine like terms: -4 + 8 = 4 -40 = 4 + 4r Solving -40 = 4 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -40 + -4r = 4 + 4r + -4r Combine like terms: 4r + -4r = 0 -40 + -4r = 4 + 0 -40 + -4r = 4 Add '40' to each side of the equation. -40 + 40 + -4r = 4 + 40 Combine like terms: -40 + 40 = 0 0 + -4r = 4 + 40 -4r = 4 + 40 Combine like terms: 4 + 40 = 44 -4r = 44 Divide each side by '-4'. r = -11 Simplifying r = -11
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