Question 454747
In America we write $100 not 100$.
We also use capital letters for names.
Donesha not donesha.
5f+10t+20y=100
f=2t
y=t+1
5*2t+10t+20(t+1)=100
10t+10t+20t+20=100
40t=80
t=2 tens
f=4 fives
y=3 twenties

check
5*4+2*10+3*20=100
20+20+60=100
ok