Identify which of the list 43, 44, 45 is the solution of 𝑡 divided by three equals
We’ve been given an equation and then a set of numbers to check for a solution. We’ll use
substitution here and substitute 43, 44, 45 in for 𝑡. This will help us determine which of the
variables make the statement true.
Let’s start with 43. We need to know does 43 divided by
three equal 15. 43 divided by three equals 14.3 repeating, which is not 15. This tells us that 𝑡
is not equal to 43.
We’ll solve the problem again, this time substituting 44 for 𝑡. We wanna know
does 44 divided by three equal 15. 44 divided by three equals 14.6 repeating, which is
not 15. And 44 will also not be our solution for 𝑡.
Finally, we can substitute 45 for 𝑡. Does 45
divided by three equal 15? It does. 45 divided by three equals 15. That means that 𝑡 equals
45. By using substitution, we eliminated all the other possible answers and found that 𝑡 was
equal to 45.