Answer:
See explanation
Step-by-step explanation:
Assuming your system is:


Then make x the subject in the first equation to get:

Put this equation into the second equation to get:





This means that:


Plug 7 into each y. 9(7) -4(7) +3
63-28+3
The answer is 38
Answer:
17/2
Step-by-step explanation:\
7 3/2 is equal to 17/2 because 2 x 7 is 14 and 14+3 is 17 and you keep the dem so its 17/2 and you cant simplify so it just becomes 7 3/2. i hope this helped.
Answer:
2/20
Step-by-step explanation:
if you add all of the marbles you will get 20 marbles in total.