What does x+2/5=12 equal and i would love to seehow you worked it out

You said                      x + 2/5 = 12

It might be easier to handle if we use the decimal for 2/5.

                                               x + 0.4 = 12

Subtract 0.4 from each side:  x = 11.6

That's all there is to it.  I'm sorry I can't make it
more complicated for you.

X +  = 12

First, subtract  from both sides. / Your problem should look like: x = 12 - 
Second, simplify 12 -  to  / Your problem should look like: x = 

Answer as fraction: x = 
Answer as decimal: x = 11.6

4+2=-2. 1+2=3. y=-2/3x+b. 2=4/3+b. 2/3=b. the answer is y= -2/3x+2/3