The price of 4 donuts and 2 croissants is $10. The price of 2 donuts and 3 croissants is $9. How much does 1 donut and 1 croissant cost?

1 donut =1.50$ 1 croissant = 2$

Step-by-step explanation:

First, replace f(x) with y

Replace every x with a y and replace every y with an x .

Solve the equation from Step 2 for y .

Replace y with f−1(x) f − 1 ( x ) .

Verify your work by checking that (f∘f−1)(x)=x ( f ∘ f − 1 ) ( x ) = x and (f−1∘f)(x)=x ( f − 1 ∘ f ) ( x ) = x are both true.