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Simplifying (r + -1) = (r + -4) + -6 Reorder the terms: (-1 + r) = (r + -4) + -6 Remove parenthesis around (-1 + r) -1 + r = (r + -4) + -6 Reorder the terms: -1 + r = (-4 + r) + -6 Remove parenthesis around (-4 + r) -1 + r = -4 + r + -6 Reorder the terms: -1 + r = -4 + -6 + r Combine like terms: -4 + -6 = -10 -1 + r = -10 + r Add '-1r' to each side of the equation. -1 + r + -1r = -10 + r + -1r Combine like terms: r + -1r = 0 -1 + 0 = -10 + r + -1r -1 = -10 + r + -1r Combine like terms: r + -1r = 0 -1 = -10 + 0 -1 = -10 Solving -1 = -10 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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