John bought 12 items from the concession stand. He bought cokes and nachos for his friends. Cokes cost $2.50 each and Nachos cost $3.50 each. He spent a total of $37. How many Nachos did he buy?

He bought 7 nachos.

Step-by-step explanation:

Let x= Number of cokes

y = Number of nachos

As per given , we have

x+y=12     (i)

2.50x+3.50y=37    (ii)

Multiply 2.5 on both sides of (i), we get

2.5x+2.5y= 30      (iii)

Subtract (iii) from (ii), we get

y=7      (iv)

Put value of y from (iv) in (i), we get

x+7=12

⇒ x= 12-7

⇒ x=5

Hence, he bought 5 cokes and 7 nachos.

x=30

step-by-step explanation: