Marcos buys 20 folders and 10 binders for a total of $100. Alicia buys 10 folders and 20 binders for $110. What is the price of each folder and each binder?

folder is $3 binder is $4

Step-by-step explanation:

Let folder be x and binders be y

Marcos

20x+10y= 1001

Alicia

10x+20y= 1102

solve 1 and 2

20x+10y= 100 X 1

10x+20y= 110 X 2

20x+10y= 100

-20x+40y= 220

        -30y= -120

y= 120/30

y= 4

put y= 4 in 1

20x+10y= 100

20x+10(4)= 100

20x+40=100

20x=100-40

20x=60

x= 60/20

x=3

answer: 59

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