Answer:
D..... 40
Step-by-step explanation:
If you need to substitute the equation x = y - 1.
If you have another equation, then you would plug in y - 1 into the x value of the equation you would need to substitute into.
Hope this helps
??? .................. so no question
The answer to #1 is 9 to 30
the answer to #2 is 4 to 3