Answer:
Justin got 7 rolls of quarters and 4 rolls of dimes.
Step-by-step explanation:
Let the roll of quarters be x
Let the rolls of dimes be y
As total money received is $90, the equation becomes;
.....(1)
And he got 11 roll of coins, so equation becomes;
or
.... (2)
Substituting the value of x from (2) in (1)




So, y = 4
As 
So, 
x = 7
Hence, Justin got 7 rolls of quarters and 4 rolls of dimes.