Question

is -10 a solution of the equation 50\C=10

Answer 1

If you plug in -10 into the equation 50/C=10, 
50/-10=10 
50/-10= -5
-5 ≠ 10 

-5 does not equal 10 so no, -10 is not a solution for the equation 50/C=10

Answer 2

no it is not a solution the solution would have to be 5