Factor.
$3 y - 21$

Answer

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Answer

Final Answer: $3 (y - 7)$

Steps

Step 1 ：The given expression is $3 y - 21$ .

Step 2 ：To factorize it, we need to find the greatest common factor (GCF) of the coefficients of the terms.

Step 3 ：The GCF of 3 and 21 is 3.

Step 4 ：So, we can factorize the expression by taking out the GCF.

Step 5 ：The factored form of the expression $3 y - 21$ is $3 (y - 7)$ .

Step 6 ：Final Answer: $3 (y - 7)$