Here are two number machines, A and B.
Input
Output
A х
x 5 - 4
B
Х
x3
+ 8
Both machines have the same input, X.
Work out the input that makes the output of A three times the output of B.
Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?