Question

Factor 21x + 15y=....
Please show how you got your answer.

Answer 1

2(x+7y)
I’m not sure about it

Answer 2

3(7x + 5y)

Explanation:

the highest common factor for this equation is 3, as 21/3 = 7 and 15/3 = 5, and 5 and 7 have no more common factors:

thus - > 21x + 15y = 3(7x + 5y)