Answer:
Step-by-step explanation:
Let 
and swap x and y:
Then, rearranging for y:
Step-by-step explanation:
3x - 6(2x + 4) = 3
3x - 12x + 24 = 3
-9x + 24 = 3
-9× = -21
x = 2.33
Answer:
2940
Step-by-step explanation:
You are subtracting a negative number. "Minus a negative is plus."
525 - (-2415) = 525 + 2415 = 2940
He will have a 1/531,441 chance of winning next week.
There are 10 balls in each container; for 6 containers, this gives us 10^6 = 1,000,000. There is 1 correct combination of balls, so his chance the first week is 1/1,000,000.
The second week, 1 ball is removed from each container; this will give us 9^6 = 531,441 chances. There is 1 correct combination, so he will have a 1/531,441 chance of winning.
