Solution:
Given that,
Lorrie has 42 coins
She will put them in stacks
Each stack will have 6 coins
Therefore,
1 stack = 6 coins
Dividing 42 by 6, we will get the number of stacks she can make
Thus, number of stacks is given as:
[tex]Number\ of\ stacks = \frac{42}{6}[/tex]
Let "x" be the number of stacks
[tex]x = \frac{42}{6}\\\\6x = 42[/tex]
[tex]Number\ of\ stacks = 7[/tex]
Thus, she can make 7 stacks and equation used is 6x = 42 or [tex]x = \frac{42}{6}[/tex]