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Simplifying (6 + -1y) + -1(12 + -1y) = -4 Remove parenthesis around (6 + -1y) 6 + -1y + -1(12 + -1y) = -4 6 + -1y + (12 * -1 + -1y * -1) = -4 6 + -1y + (-12 + 1y) = -4 Reorder the terms: 6 + -12 + -1y + 1y = -4 Combine like terms: 6 + -12 = -6 -6 + -1y + 1y = -4 Combine like terms: -1y + 1y = 0 -6 + 0 = -4 -6 = -4 Solving -6 = -4 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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