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