An indirect proof starts with the assumption that the statement we are tying to prove is not true.
a > 7
An indirect proof starts with the assumption that the statement we are trying to prove is not true. In this case, we should focus on the conclusion of the conditional statement.
If3a+7 ≤ 28 ,_(Hypothesis) thena ≤ 7._(Conclusion)
The negation of this statement is will give us the necessary assumption.
Assumption: a > 7
