To simplify the expression 2x + 6x - 7x, we can combine the like terms.
The like terms are the terms that have the same variable raised to the same power. In this case, all the terms have x raised to the power of 1.
Adding or subtracting like terms involves adding or subtracting the coefficients (the numbers in front of the variable).
So, let's combine the like terms:
2x + 6x - 7x
The coefficients of the x terms are 2, 6, and -7.
Adding the coefficients: 2 + 6 - 7 = 8 - 7 = 1
Therefore, 2x + 6x - 7x simplifies to x.