# At a sandwich shop, sandwiches cost $1.50 each and fruit drinks At cost$.40 each. If a bill for an order of 20 items was $17.00, how many fruit drinks were ordered? ##### 1 Answer Oct 7, 2017 Number of fruit drinks ordered were 12. #### Explanation: Given that: Cost of one sandwich =$ 1.50 and
Cost of one fruit drink = $0 .40 . An order of 20 items was placed. And the bill was$17.00.
Asked: How many fruit drinks were ordered?
Solution:
Let the number of sandwiches be ordered be $x$.
So the number of fruit drinks ordered will be = $20 - x$

Cost of $x$ sandwiches will be = $1.50\ times x = $ 1.50 x
and

Cost of $\left(20 - x\right)$ fruit drinks will be = $0 .40 .\ times (20-x) = $0 .40 (20-x) = $8.00 -$0.40x

The bill will be : cost of sandwiches + cost of fruit drinks.

=$1.50 x +$ 8 - $0.40x =$ 8 + $1.10x We know that the total bill was$17.00 . That means,

$8 +$1.10x =$17.00 1.10 x=$17.00- $8.00  x =$9/ 1.10 = $8.1818 ~~ 8# Number of sandwiches is $x = 8$so number of fruit drinks will be $20 - x = 20 - 8 = 12\$

Therefore

Number of fruit drinks ordered were 12.