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Simplifying 6r + -2(2 + -1r) = 4(2r + -1) 6r + (2 * -2 + -1r * -2) = 4(2r + -1) 6r + (-4 + 2r) = 4(2r + -1) Reorder the terms: -4 + 6r + 2r = 4(2r + -1) Combine like terms: 6r + 2r = 8r -4 + 8r = 4(2r + -1) Reorder the terms: -4 + 8r = 4(-1 + 2r) -4 + 8r = (-1 * 4 + 2r * 4) -4 + 8r = (-4 + 8r) Add '4' to each side of the equation. -4 + 4 + 8r = -4 + 4 + 8r Combine like terms: -4 + 4 = 0 0 + 8r = -4 + 4 + 8r 8r = -4 + 4 + 8r Combine like terms: -4 + 4 = 0 8r = 0 + 8r 8r = 8r Add '-8r' to each side of the equation. 8r + -8r = 8r + -8r Combine like terms: 8r + -8r = 0 0 = 8r + -8r Combine like terms: 8r + -8r = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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