Justin wants to simplify the following expression: 80 ÷ 4(25 - 20) x 8

What operation did Justin perform third, and what was its resulting value?

Multiply 4 times 5; 20
Multiply 20 times 5; 100
Subtract 20 from 25; 5
Multiply 20 times 8; 160

they sell 240 sw =)))

Step-by-step explanation:

x= the number of b water they sold

y= the number of sw they sold

because they sold a total of 390 items => x+y= 390   (1)

because they sold water for $2 a bottle and the sandwiches for $4 each => 2x + 4y= 1260   (2)

(1) and (2) => x=150 ; y=240.

i hope this will help you =)))