Combine the like terms for the expression 3x-4+x+5

2x-1
2x+9
4x-9
4x+1

4x+1

To combine like terms, we add or subtract the coefficients of the same variables.

In the given expression, we have 3x, x, -4, and 5.

Start by combining the x terms, which are 3x and x. 3x + x equals 4x.

Next, combine the constant terms, -4 and 5. -4 + 5 equals 1.

Therefore, the combined expression is 4x + 1.