Question

Tìm các số nguyên x, y biết:A/ 2/3 = x/60B/ -1/2 = y/18C/ 3/x = y/35 = -36/84D/ 7/x = y/27 = -42/54

Answer 1

`A)2/3=x/60`

`=>40/60=x/60`

`=>x=40`

`B)-1/2=y/18`

`=>-9/18=y/18`

`=>y=-9`

`C)3/x=y/35=-36/84`

Mà `-36/84=(-3 xx 12)/(7 xx 12)=-3/7`

`=>3/x=-3/7`

`=>x=-7`

`y/35=-3/7=-15/35`

`=>y=-15`

`D)7/x=y/27=-42/54`

Mà `-42/54=(-7 xx 6)/(9 xx 6)=-7/9`

`=>7/x=-7/9`

`=>x=-9`

`y/27=-7/9=-21/27`

`=>y=-21`

Answer 2

a) Ta có: \(\dfrac{2}{3}=\dfrac{x}{60}\)

\(\Leftrightarrow x=\dfrac{2\cdot60}{3}=40\)

Vậy: x=40