Question 881887
1p+5n+25q=155
d=q+4

q+d=p

p-d-q=0
1p+10d+25q=155
0p+d-q=4

1,-1,-1,0
1,10,25,155
0,1,-1,4

1,0,0,10
0,1,0,7
0,0,1,3
10 pennies 7 dimes and 3 quarters