Brandon has a cup of quarters and dimes with the total value of $3.80. The number of quarters is 4 less than twice the number of dimes. How many quarters and how many how many dimes does Brandon have

Dimes = 8 and

Quarters = 12

Step-by-step explanation:

Total value = 380 cents

let dimes be x

quarters be 2x - 4

100 pennies = $1

1 dime = 10 pennies

1 quarter = 25 pennies

Therefore;

$ 3.78 = 378 pennies

10x+25 (2x-4) = 378

10x + 50 x - 100 = 378

60 x = 378 + 100

60 x = 478

x = 478/60

= 7.9667

≈ 8

Therefore;

Dimes = 8 and

Quarters = 12