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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: (90+x)*(x-(-99)=190 Giúp mình với ạ

Toán Lớp 6: (90+x)*(x-(-99)=190
Giúp mình với ạ

Comments ( 2 )

  1. (90+x).(x-(-99))=190
    (90+x).(x+90)=190
    2(90+x)=190
       90+x  = 190:2 
       90+x = 95
             x = 95-90 
             x = 5

  2. (90+x)×(x-(-99)=190
    (90+x)×(x+90)=190
    2(90+x)=190
    x=5

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222-9+11+12:2*14+14 = ? ( )

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