Posted by Jullian B. on .
0.05x+0.10y=1.30
x+y=19

Math 
Reiny,
multiply the first by 20 to get rid of those nasty decimals
x + 2y = 26
subtract the second equation from that
y = 7
plug back into the 2nd
x+7=19
x=12
x=12, y=7