1.

sIMcas)56 12 122

Answer»

= Let the missing number be x.

= (12 + x ) / 6 + 53 / 12 = 79 / 12

= (12 + x ) / 6 = 79 / 12 - 53 / 12

= (12 + x ) / 6 = 26 / 12

= 12 + x = 26 / 12 * 6

= 12 + x = 13

= x = 13 - 12 = 1.



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