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Simplifying n + -20 = n + 6 * 15 Reorder the terms: -20 + n = n + 6 * 15 Multiply 6 * 15 -20 + n = n + 90 Reorder the terms: -20 + n = 90 + n Add '-1n' to each side of the equation. -20 + n + -1n = 90 + n + -1n Combine like terms: n + -1n = 0 -20 + 0 = 90 + n + -1n -20 = 90 + n + -1n Combine like terms: n + -1n = 0 -20 = 90 + 0 -20 = 90 Solving -20 = 90 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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