Question

Which equation has a solution of k=6.5​

Answer 1

Consider the complete question is "Which equation has a solution of k = 6.5? A. -3k = 19.5 , B. -1 + k = 7.5 , C. -7k = -45.5 , D. -2 + k = -8.5."

Given:

Solution of equation is k=6.5.

To find:

The equation.

Solution:

In option A,

`-3k=19.5`

`k=(19.5)/(-3)`

`k=-6.5\\eq 6.5`

In option B,

`-1+k=7.5`

`k=7.5+1`

`k=8.5\\eq 6.5`

In option C,

`-7k = -45.5`

`k =( -45.5)/(-7)`

`k =6.5`

In option D,

`-2+k=-8.5`

`k=-8.5+2`

`k=-6.5\\eq 6.5`

Therefore, the correct option is C.