Question 59302
N=5D
10D+5N=350 SUBSTITUTING 5D FOR N WE GET
10D+5*5D=350
10D+25D=350
35D=350
D=10 NUMBER OF DIMES
THEN 
N=5*10
N=50 NUMBER OF NICKELS
PROOF
10*10+5*50=350
100+250=350
350=350