It is known that the first digit of the three digits is 8, but the last two digits don't know. There are six empty digits, which can only be selected from 1 to 6

It is known that the first digit of the three digits is 8, but the last two digits don't know. There are six empty digits, which can only be selected from 1 to 6


814*4=3256



A number minus 2 / 5 equals 2 / 3 of 6. What's the number?


Let this number be X
x-2/5x=6×2/3
3/5x=4
x=20/3



The opposite of 1 minus the difference of a certain number is equal to 2 times of the number. Find the number


Let this number be X:
-(1-x)=2x
x=-1