# How do you find the gcf of 18x + 15y?

Jun 29, 2018

$3$

#### Explanation:

$x \text{ and "y" have no other common factors but 1}$

$\text{the factors of 18 and 15 are}$

$18 \to 1 , 2 , \textcolor{red}{3} , 6 , 9 , 18$

$15 \to 1 , \textcolor{red}{3} , 5 , 15$

$\text{the gcf being } \textcolor{red}{3}$

$\text{the gcf of "18x+15y" is therefore 3}$