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Simplifying 2r2 + -3 = -3 + -2(2r + -1r2) Reorder the terms: -3 + 2r2 = -3 + -2(2r + -1r2) -3 + 2r2 = -3 + (2r * -2 + -1r2 * -2) -3 + 2r2 = -3 + (-4r + 2r2) Add '3' to each side of the equation. -3 + 3 + 2r2 = -3 + -4r + 3 + 2r2 Combine like terms: -3 + 3 = 0 0 + 2r2 = -3 + -4r + 3 + 2r2 2r2 = -3 + -4r + 3 + 2r2 Reorder the terms: 2r2 = -3 + 3 + -4r + 2r2 Combine like terms: -3 + 3 = 0 2r2 = 0 + -4r + 2r2 2r2 = -4r + 2r2 Add '-2r2' to each side of the equation. 2r2 + -2r2 = -4r + 2r2 + -2r2 Combine like terms: 2r2 + -2r2 = 0 0 = -4r + 2r2 + -2r2 Combine like terms: 2r2 + -2r2 = 0 0 = -4r + 0 0 = -4r Solving 0 = -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. 0 + 4r = -4r + 4r Remove the zero: 4r = -4r + 4r Combine like terms: -4r + 4r = 0 4r = 0 Divide each side by '4'. r = 0 Simplifying r = 0
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