Question

The sum of two rational numbers is -8. if one of the is -8/17, find the other​

Answer 1

`let \: the \: unknown \: = x \: and \: y \\ x + y = - 8 \\ y = ( - 8)/(17) \\ x - (8)/(17) = - 8 \\ x = - 8 + (8)/(17) \\ x = (17 * - 8 + 8)/(17) \\ x = ( - 136 + 8)/(17) \\ x = ( - 128)/(17) \\ thank \: you`

Answer 2

Let other one be x

ATQ

`\\ \sf\longmapsto x+(-8)/(17)=-8`

`\\ \sf\longmapsto(17x-8)/(17)=-8`

`\\ \sf\longmapsto 17x-8=17(-8)=-136`

`\\ \sf\longmapsto 17x=-136+8`

`\\ \sf\longmapsto 17x=-128`

`\\ \sf\longmapsto x=(-128)/(17)`