Question

a , 43 + ( 9 - 21 ) = 317 - ( x + 317 )

b , ( 15 - x ) + ( x - 12 ) = 7 - ( -5 + x )

c , x - { 57 - [ 42 + ( -23 - x )]} = 13 - { 47 + [ 25 - ( 32 - x )]}

d , -7 + | x - 4 | = -3

e , 13 - | x + 5 | = 13

g , | x - 10 | - ( -12 ) = 4

h , | x + 2 | < 5

Answer 1

a, 43 + ( 9 - 21 ) = 317 - ( x + 317 )

   43 + ( -12 ) = 317 - x - 317

   43 - 12 = 317 - 317 - x

   -x = 31

   x = -31

b, (15-x) + (x-12) = 7- (-5 + x)

    15-x+x-12 = 7+5-x

     15-12 = 12-x

     3 = 12-x

     x =  12-3

     x = 9

c, x - { 57- [42+ (-23 - x)]} = 13- {47+ [25- (32-x)]}

   x - [57- (42-23-x)] = 13- [47+ (25-32+x)]

   x - [57- (19-x)] = 13- [47+ (x-7)]

   x - (57-19+x) = 13- (47+x-7)

   x - (38+x) = 13- (40+x)

   x-38-x = 13-40-x

   x = 13-40+38

   x = 11

Answer 2

a , 43 + ( 9 - 21 ) = 317 - ( x + 317 )

b , ( 15 - x ) + ( x - 12 ) = 7 - ( -5 + x )

c , x - { 57 - [ 42 + ( -23 - x )]} = 13 - { 47 + [ 25 - ( 32 - x )]}

d , -7 + | x - 4 | = -3