a, 456 : y = 5 (dư 1) b, y : 123 = 205 (dư 100) c, 10 000 – 125 x y = 8 500 d, 426 x y + 159 x y +415 x y = 2 030 000 Giúp mình với !

0 bình luận về “a, 456 : y = 5 (dư 1) b, y : 123 = 205 (dư 100) c, 10 000 – 125 x y = 8 500 d, 426 x y + 159 x y +415 x y = 2 030 000 Giúp mình với !”

1. `\text{a. 456 : y = 5 (dư 1)}`

   `(456 – 1) : y = 5`

   `455 : y = 5`

   `y = 455 : 5`

   `y = 91`

   `\text{b. y : 123 = 205 (dư 100)}`

   `(y – 100) : 123 = 205`

   `y – 100 = 205 × 123`

   `y – 100 = 25215`

   `y = 25215 + 100 = 25315`

   `c. 10 000 – 125 × y = 8 500`

   `125 × y = 10 000 – 8500`

   `125 × y = 1 500`

   `y = 1 500 : 125 = 12`

   `d. 426 × y + 159 × y + 415 × y = 2 030 000`

   `y×(426 + 159 + 415) = 2 030 000`

   `y×1000=2030000`

   `y = 2030000:1000=2030`

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2. `a, 456 : y = 5` (dư `1`)

   `=> (456 – 1) : y = 5`

   `455 : y = 5`

   `y = 455 : 5`

   `y = 91`

    

   `b, y : 123 = 205` (dư `100`)

   `=> (y – 100) : 123 = 205`

   `y – 100 = 205 xx 123`

   `y – 100 = 25215`

   `y = 25215 + 100`

   `y = 25315`

    

   `c, 10 000 – 125 xx y = 8 500`

   `125 xx y = 10000 – 8500`

   `125 xx y = 1500`

   `y = 1500 : 125`

   `y = 12`

    

   `d, 426 xx y + 159 xx y + 415 xx y = 2 030 000`

   `y xx (426 + 159 + 415) = 2 030 000`

   `y xx 1000 = 2 030 000`

   `y = 2 030 000 : 1000`

   `y = 2030`

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