I just need help set up

Lisa and april share their own set of cards. Lisa has 12 times as many as maria has, april has twice as many as jim has.can you write an expression and solve to know how many each has when
Maria expression is "x"
And jim 6x

2 answers

So from here what do i do
12x =12x
Maria: x
Lisa: 12x
Jim: 6x
April: 2*6x = 12x

These numbers don't add up very well. How do you know Jim has 6x cards?