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Simplifying 4N = 9 + -2(-2N + 9) Reorder the terms: 4N = 9 + -2(9 + -2N) 4N = 9 + (9 * -2 + -2N * -2) 4N = 9 + (-18 + 4N) Combine like terms: 9 + -18 = -9 4N = -9 + 4N Add '-4N' to each side of the equation. 4N + -4N = -9 + 4N + -4N Combine like terms: 4N + -4N = 0 0 = -9 + 4N + -4N Combine like terms: 4N + -4N = 0 0 = -9 + 0 0 = -9 Solving 0 = -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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