Adelia had 4 dollars. she found 50 cents then bought a snack. she ended up with 6 quarters.

Adelia brought a snack that costed 3 dollars.

Step-by-step explanation:

4 quarters in each dollar

(4dollars*4quarters)

$4.00=16 quarters

(she found 2 more quarters)

16+2=18

0.25*18= $4.50

She brought a snack that left her with 6 quarters ($1.50)

$4.50-$1.50=$3.00

Adelia brought a snack for $3.00

x is variable or an unknown value to find

example:

2x = 5 which means x = 3