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Simplifying (r + -4) + -1(4r + 4) = -3r Reorder the terms: (-4 + r) + -1(4r + 4) = -3r Remove parenthesis around (-4 + r) -4 + r + -1(4r + 4) = -3r Reorder the terms: -4 + r + -1(4 + 4r) = -3r -4 + r + (4 * -1 + 4r * -1) = -3r -4 + r + (-4 + -4r) = -3r Reorder the terms: -4 + -4 + r + -4r = -3r Combine like terms: -4 + -4 = -8 -8 + r + -4r = -3r Combine like terms: r + -4r = -3r -8 + -3r = -3r Add '3r' to each side of the equation. -8 + -3r + 3r = -3r + 3r Combine like terms: -3r + 3r = 0 -8 + 0 = -3r + 3r -8 = -3r + 3r Combine like terms: -3r + 3r = 0 -8 = 0 Solving -8 = 0 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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