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Simplifying -4 + (-2r) + -1(-2r) + (-4) + -1(-18) = -6 Remove parenthesis around (-2r) -4 + (-2r) + -1 * -2r + (-4) + -1(-18) = -6 Multiply -1 * -2 -4 + (-2r) + 2r + (-4) + -1(-18) = -6 -4 + (-2r) + 2r + -4 + -1(-18) = -6 Multiply -1 * -18 -4 + (-2r) + 2r + -4 + 18 = -6 Reorder the terms: -4 + -4 + 18 + (-2r) + 2r = -6 Combine like terms: -4 + -4 = -8 -8 + 18 + (-2r) + 2r = -6 Combine like terms: -8 + 18 = 10 10 + (-2r) + 2r = -6 Combine like terms: (-2r) + 2r = 0 10 + 0 = -6 10 = -6 Solving 10 = -6 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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