1. Solve the following equations for $x$. Write your answer in set notation.
a. $3 x-5=16$

Answer

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Answer

Final Answer: \(\boxed{\{7\}\})

Steps

Step 1 ：Add 5 to both sides of the equation to get rid of the -5 on the left side. This will give us $3x = 21$.

Step 2 ：Divide both sides by 3 to solve for $x$.

Step 3 ：The solution to the equation is $x = 7$. This is the only solution, so the set of solutions is $\{7\}$.

Step 4 ：Final Answer: \(\boxed{\{7\}\})