x=4 because if you add 7 to 10 you get -2x-3=-14x then you add -2x to -14x and you get -3=-12 then you divide by -3 and -12 to get 4
To find your sale price you must:

just simply follow that operation and you're good to go
Answer:
f(x)= -7x+7
Step-by-step explanation:
128/2^x x being the number of rounds.
128/2^6
128/64
2
2 teams are left at the 6th round.