Answer:
One is 3x+2 while the other is 2x-1
Step-by-step explanation:
It is opposite to one another
the one with 3x+2 is opposite to the non given one and the one withb2x-1 is opposite
Answer:

Step-by-step explanation:
The given number is 
We need to write this number in standard form.
Any no is given in the standard form is given by :

Where
a and b is real no and integer
It means,

Hence, this is the required solution.
3 should be added to the tiles
Answer: 32, -64, 128, -256