algenra
posted by Anonymous .
Anna has 12 bills in her wallet, some $5 and some $10. The total value of the bills is $100. How many of each bill does Anna have? is this how i do this?
x+y=12
5x+10y=100
y=12x
5x+10(12x)
5x+12010x=100
5x10x=25x=20
x4
y8
Looks good to me.
Matt
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