Question

Omar wants to buy chairs for his new office. Each chair costs $12 and there is a flat delivery fee of $10. If he has $80, how many chairs can he buy?

Answer 1

This is of the form `ax+b=c`

Explanation:

`a=`price per chair ($12)
`x=`number of chairs
`b=`delivery fee ($10)

Now the problem can be filled in:
`12*x+10=80->` (subtract 10 from both sides)
`12*x=70->` (divide by 12)
`x=70/12=5 10/12`

So he can buy 5 chairs and have $10 left. He is $2 short for the 6th chair.