Question

15. Solve for the specified variable:
-
х
+
7 8
- 10; for y.

Answer 1

`y=80-(8x)/(7)`

Explanation:

15). Given equation is,

`(x)/(7)+ (y)/(8)=10`

Multiply the equation by 8,

`8((x)/(7)+ (y)/(8))=10* 8`

`(8x)/(7)+y=80`

Subtract
`(8x)/(7)` from both the sides of the equation,

`(8x)/(7)+y-(8x)/(7)=80-(8x)/(7)`

`y=80-(8x)/(7)`

Therefore, value of the variable 'y' will be,

`y=80-(8x)/(7)`