Предмет: Математика, автор: 01121977

решите уравнение
2,8(15+х)=3,5х
у меня получилось 60, но я сомневаюсь..помогите пожалуйста)))заранее спасибо!!!

Y4eenik: 2.8(15+x)=3.5x
2.8*15+x*2.8=3.5x
42+2.8x=3.5x
-3.5x+2.8=-42
-0.7x=-42
x=-42:(-0.7)
x=60

Y4eenik: вот у меня так получилось

01121977: спасибо!

Ответы

Автор ответа: milan175

1

2,8(15+х)=3,5х
42+2,8х=3,5х
2,8х-3,5х=-42
-0,7х=-42
х=-42:(-0,7)
х=60

01121977: спасибо огромное!

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