Factor 21x + 35y
To factorize the expression 21x + 35y, we can first look for any common factors between the two terms. In this case, the common factor is 7. By factoring out 7, we get:
21x + 35y = 7(3x + 5y)
Therefore, the factored form of 21x + 35y is 7(3x + 5y).