Answer:
Harry can first substitute 30 for t. He can then multiply
by 30 to get a product of 10. Since, 15 is not equal to 15, Harry's solution is not correct.
Explanation:
Harry solves the equation
. He says the solution is 30.
Now, to check whether Harry correct or not, Harry can first substitute 30 for t. He can then multiply
by 30 to get a product of 10. Since, 15 is not equal to 15, Harry's solution is not correct.
This is an alternate way to check the answer obtained is correct or not. (Answer)