N+2n-3n

To simplify the expression n + 2n - 3n, we need to combine like terms.

Notice that the terms n, 2n, and -3n all have the same variable (n). To combine them, we add or subtract their coefficients.

Given the expression n + 2n - 3n, let's simplify it step by step:

Step 1: Combine the like terms with the same variable, n: n + 2n - 3n = (1 + 2 - 3)n

Step 2: Simplify the sum in parentheses: (1 + 2 - 3)n = 0n

Step 3: Simplify 0n: 0n = 0

Therefore, the simplified form of the expression n + 2n - 3n is 0.