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Simplifying 2r = -10r + -8(1 + -2r) 2r = -10r + (1 * -8 + -2r * -8) 2r = -10r + (-8 + 16r) Reorder the terms: 2r = -8 + -10r + 16r Combine like terms: -10r + 16r = 6r 2r = -8 + 6r Solving 2r = -8 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 2r + -6r = -8 + 6r + -6r Combine like terms: 2r + -6r = -4r -4r = -8 + 6r + -6r Combine like terms: 6r + -6r = 0 -4r = -8 + 0 -4r = -8 Divide each side by '-4'. r = 2 Simplifying r = 2
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