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Simplifying (y + -7) + -1(y + 3) = 9 Reorder the terms: (-7 + y) + -1(y + 3) = 9 Remove parenthesis around (-7 + y) -7 + y + -1(y + 3) = 9 Reorder the terms: -7 + y + -1(3 + y) = 9 -7 + y + (3 * -1 + y * -1) = 9 -7 + y + (-3 + -1y) = 9 Reorder the terms: -7 + -3 + y + -1y = 9 Combine like terms: -7 + -3 = -10 -10 + y + -1y = 9 Combine like terms: y + -1y = 0 -10 + 0 = 9 -10 = 9 Solving -10 = 9 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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