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Simplifying (-1n + -2) + -1(2n + 5) = -3n + -7 Reorder the terms: (-2 + -1n) + -1(2n + 5) = -3n + -7 Remove parenthesis around (-2 + -1n) -2 + -1n + -1(2n + 5) = -3n + -7 Reorder the terms: -2 + -1n + -1(5 + 2n) = -3n + -7 -2 + -1n + (5 * -1 + 2n * -1) = -3n + -7 -2 + -1n + (-5 + -2n) = -3n + -7 Reorder the terms: -2 + -5 + -1n + -2n = -3n + -7 Combine like terms: -2 + -5 = -7 -7 + -1n + -2n = -3n + -7 Combine like terms: -1n + -2n = -3n -7 + -3n = -3n + -7 Reorder the terms: -7 + -3n = -7 + -3n Add '7' to each side of the equation. -7 + 7 + -3n = -7 + 7 + -3n Combine like terms: -7 + 7 = 0 0 + -3n = -7 + 7 + -3n -3n = -7 + 7 + -3n Combine like terms: -7 + 7 = 0 -3n = 0 + -3n -3n = -3n Add '3n' to each side of the equation. -3n + 3n = -3n + 3n Combine like terms: -3n + 3n = 0 0 = -3n + 3n Combine like terms: -3n + 3n = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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