Translate the sentence into an inequality.
Twice the difference of a number and 10 is less than or equal to -28.
Use the variable y for the unknown number.

Reversing the clauses of an "if-then" statement only sometimes makes the new statement true, so it isn't true or false. For example, reversing the clauses of "if 1=x, then x=1" makes the new statement true, but reversing the clauses of "if x=2, then |x|=2" doesn't.