Question

2. A book with a green sticker costs $2 less than half the price of a

book with a yellow sticker

I need help with this one

Answer 1

For this case we can propose an equation that will allow us to find the price of one of the books knowing the price of the other.

x: Let the variable that represents the price of the book with a green sticker

y: Let the variable that represents the price of the book with a yellow sticker

According to the statement we have:

`x = \frac {y} {2} -2\\`

`y=2(x+2)`

Finally, we can substitute the price of one of the books and clear the value of the other as the case may be.

Answer:

`x = \frac {y} {2} -2`