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90 by 7 - [{6 by 11 + (6 by 9 ÷ 6 by 7 ) of 23 by 5 } - 5 |
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Answer» 3+2=7 MEANS (3*2)+1=75+4=23 means (5*4)+3=237+6=47 means (7*6)+5=479+8=79 means (9*8)+7=79 |
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