Final answer:
To combine like terms in the expression 6+8x-7-x, the correct algebraic expression is 7x-1.
Step-by-step explanation:
To combine like terms in the expression 6+8x-7-x, we can add the coefficients of the terms with the same variable. The constant terms 6 and -7 can be combined to give -1. The x terms 8x and -x can be combined to give 7x. Therefore, the correct algebraic expression after combining like terms is 7x-1.
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