Mrs. Dodson is shopping for school supplies with her children. Vivian selected 2 one-inch binders and 1 two-inch binder, which c
ost a total of $15. Mia selected 2 one-inch binders and 4 two-inch binders, which cost a total of $36. How much does each size of binder cost? A one-inch binder costs $, and a two-inch binder costs $.
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