Question

tim x

 2193 : {[( 2223 -18x ) : 135 ] +123} + 1996= 2013

Answer 1

2193:{[(2223-18x):135]+ 123}=2013-1996 2193:{[(2223-18x):135]+ 123=17 [(2223-18x):135]+123= 2193:17 [(2223-18x):135]+123=129 (2223-18x):135=129-123=6 2223-18x=6.135=810 18x=2223-810=1413 x=1413:18=78,5

Answer 2

2193: {[( 2223 - 18x): 135] + 123} + 1996 = 2013 

____ _______________________           = 2013 - 1996 = 17

[( 2223 - 18x) : 135] +123  = 2193: 17 = 129

(2223 - 18x) : 135 = 129 - 123 = 3

2223 - 18x = 135.3 = 405

18x = 2223 - 405 = 1818

x = 1818: 18 = 101

Vậy x = 101

                              tíc nha!

Answer 3

tim x

 2193 : {[( 2223 -18x ) : 135 ] +123} + 1996 = 2013

2193 : [( 2223 - 18x ) : 135] +123 = 17

2193 : (2223 - 18x ) : 135 = 140

2193: (2223 - 18x ) = 18900

2223 - 18x = ???

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