Предмет: Математика, автор: девочка201

В коробке 8 жуков и пауков ,всего у них 54 лапы. сколько жуков и пауков роздельно?     ПОМОГИТЕ  ПРОШУУУ

Ответы

Автор ответа: valyaura
0

У жуков по 6 лапок, у пауков - по 8. Если в коробке все жуки, то и лап было бы 6 х 8 = 48.

А так лап 54, тоесть 6 "лишних". Это и есть лапы пауков, 6 : 2= 3  паука, а значит жуков 8-3=5.

Проверим 3 х 8+ 5 х 6 = 54

Ответ 3 паука и 5 жуков

Автор ответа: ali79
0

х-количество жуков (по 6 лап)

у-количество пауков (по 8 лап)

 

х+у=8

6х+8у=54

у=8-х

6х+8(8-х)=54

6х+64-8х=54

2х=10

х=10:2

х=5 жуков

у=8-5=3 паука

 

5+3=8 жуков и пауков

5*6+3*8=30+24=54 лапы

 

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