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Simplifying 6r + -2(2r) = 4(2r + -1) Remove parenthesis around (2r) 6r + -2 * 2r = 4(2r + -1) Multiply -2 * 2 6r + -4r = 4(2r + -1) Combine like terms: 6r + -4r = 2r 2r = 4(2r + -1) Reorder the terms: 2r = 4(-1 + 2r) 2r = (-1 * 4 + 2r * 4) 2r = (-4 + 8r) Solving 2r = -4 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. 2r + -8r = -4 + 8r + -8r Combine like terms: 2r + -8r = -6r -6r = -4 + 8r + -8r Combine like terms: 8r + -8r = 0 -6r = -4 + 0 -6r = -4 Divide each side by '-6'. r = 0.6666666667 Simplifying r = 0.6666666667
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