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Simplifying 7 + -9(x + 3) = 7 + 3(9 + -3x) + -81 Reorder the terms: 7 + -9(3 + x) = 7 + 3(9 + -3x) + -81 7 + (3 * -9 + x * -9) = 7 + 3(9 + -3x) + -81 7 + (-27 + -9x) = 7 + 3(9 + -3x) + -81 Combine like terms: 7 + -27 = -20 -20 + -9x = 7 + 3(9 + -3x) + -81 -20 + -9x = 7 + (9 * 3 + -3x * 3) + -81 -20 + -9x = 7 + (27 + -9x) + -81 Reorder the terms: -20 + -9x = 7 + 27 + -81 + -9x Combine like terms: 7 + 27 = 34 -20 + -9x = 34 + -81 + -9x Combine like terms: 34 + -81 = -47 -20 + -9x = -47 + -9x Add '9x' to each side of the equation. -20 + -9x + 9x = -47 + -9x + 9x Combine like terms: -9x + 9x = 0 -20 + 0 = -47 + -9x + 9x -20 = -47 + -9x + 9x Combine like terms: -9x + 9x = 0 -20 = -47 + 0 -20 = -47 Solving -20 = -47 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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