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