Question 214201
p=4d
.01p+.10d=98
.01*4d+.10d=.98
.04d+.10d=.98
.14d=.98
d=.98/.14
d=7 dimes.
p=4*7=28 pennies.
Proof:
.01*28+.10*7=.98
.28+.70=98
.98=.98