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Simplifying 6r + -4 + -1(-2r) = 8r + -4 Remove parenthesis around (-2r) 6r + -4 + -1 * -2r = 8r + -4 Multiply -1 * -2 6r + -4 + 2r = 8r + -4 Reorder the terms: -4 + 6r + 2r = 8r + -4 Combine like terms: 6r + 2r = 8r -4 + 8r = 8r + -4 Reorder the terms: -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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