Question

a) ? : ( 11 ) = -22
b) ? - (-14) = +40
c) (-29) - ? = +51

Answer 1

a) x : 11 = -22
    x          -22
------- = ---------
   11         1

x = 11 . -22
x = - 242

b) x - (-14 = + 40
    x + 14 = 40
    x = 40 - 14
   x = 26

c) (-29) - x = 51
    -29 - x = 51
   -x = 51 + 29
   - x = 80      -------multiplicando por (-1)
     x = - 80

Answer 2

a)
x / 11 = -22
x = -22 x 11
x = -242

b)
x -(-14) = 40
x+14=40
x=40-14
x=26

c)
-29 - x=51
-x=51+29     x(-1)
x=-80

prova: -29-(-80)=51 => -29+80=51 => 51=51