The expression is given as x - 11
To determine the expression, we have that algebraic expressions are defined as expressions that are made up of terms, variables, constants, factors and coefficients.
From the information given, we have that;
The difference when (7x+10) is subtracted from (8x+1) in simplest terms
This is represented as;
8x -1 - (7x + 10)
expand the bracket, we have;
8x - 1 - 7x - 10
collect the like terms, we have;
x - 11