The ratio of Mario's money to Luigi's money was 9:4 before Mario went to the store. After Mario spent $84 on jackets, the ratio became 1:2. How much money did Mario have at first?
m/l = 9/4
4m = 9l
(m-84)/l = 1/2
2m-168 = l
4m = 9(2m-168)
4m = 18m -1512
14m = 1512
m = 108
I hope this helped. :))
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