Question

 

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Answer 1

36.66 - 38.56 + 62.65 - 62.65

= 2376 - 2128 + 0

= 248

1440 : [ 120 - ( 3x + 9 ) ] = 120

120 - ( 3x + 9 ) = 1440 : 120

120 - ( 3x + 9 ) = 12

3x + 9 = 120 - 12

3x + 9 = 108

3x = 108 - 9

3x = 99

  x = 99 : 3 

  x = 33

120 + [ ( 999 - 9x ) : 60 ] . 24 = 480

( 999 - 9x ) : 60 . 24 = 480 - 120

( 999 - 9x ) : 60 . 24 = 360

( 999 - 9x ) : 60 = 360 : 24

( 999 - 9x ) : 60 = 15

999 - 9x = 15 x 60

999 - 9x = 900

9x = 999 - 900

9x = 99

  x = 99 : 9

  x = 11