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User Rliu
by
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1 Answer

1 vote

Answer:


3(7)-7=14

Step by step explanation:

To calculate the expression 3a-7 when a=7, we need to substitute a=7 into the expression:


\begin{gathered} 3a-7=3(7)-7 \\ 3(7)-7=21-7 \\ 3(7)-7=14 \end{gathered}

User Olena Horal
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