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Simplifying -1r + 2r + r + -2 = (-3 + 2 + 1) * r + -2 Reorder the terms: -2 + -1r + 2r + r = (-3 + 2 + 1) * r + -2 Combine like terms: -1r + 2r = 1r -2 + 1r + r = (-3 + 2 + 1) * r + -2 Combine like terms: 1r + r = 2r -2 + 2r = (-3 + 2 + 1) * r + -2 Combine like terms: -3 + 2 = -1 -2 + 2r = (-1 + 1) * r + -2 Combine like terms: -1 + 1 = 0 -2 + 2r = (0) * r + -2 Anything times zero is zero. -2 + 2r = 0r + -2 Combine like terms: 0 + -2 = -2 -2 + 2r = -2 Add '2' to each side of the equation. -2 + 2 + 2r = -2 + 2 Combine like terms: -2 + 2 = 0 0 + 2r = -2 + 2 2r = -2 + 2 Combine like terms: -2 + 2 = 0 2r = 0 Solving 2r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '2'. r = 0 Simplifying r = 0
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