Question

Ronny and Johnny were getting ready for school. Ronny was the only one that had money to spend though, as Johnny spent 30 dollars last week on supplies. Ronny decided to buy a magazine about math that cost him $15.50 and he also bought four erasers. Ronny spent a total of $29.50. How much did each eraser cost Ronny?

Answer 1

Cost of one eraser is $3.5.

Explanation:

Total money spent by Ronny = $29.50

from which he spent -

Math magazine = $15.50

and four erasers.

Let the cost of one eraser be x

cost of four erasers = 4x

Forming the equation -

`29.50=4x+15.50`

`4x = 29.50-15.50\\4x=14\\x=14/4\\x= 3.5`

Cost of one eraser is $3.5.