Respuesta :

10.)

b- 5 = -5

Step 1 Additive Inverse

b+-5=-5
    +5   5
 --------------
       b=0


b=0


11.)2p=18

     2p            18
----------- = -----------
      2              9

p=2
#10 is simply b=0, and it would appear that 11. is x=9 but it might be cut off...