9*10^10 - 4*10^10 = 5*10^10
All you have to do is subtract 4 from 9, since the powers are the same
Subsitute -4y for x
-4y+6y=18
2y=18
divide both sides by 2
y=9
sub back
x=-4y
x=-4(9)
x=-36
(x,y)
(9,-36)
Answer:
3
Step-by-step explanation:
If there are 3 strikes per 10, there should be 9 strikes per 30.
So there are 30 chips in the bag.
