Question

tell whether each equation is true,false, or open.
7k-8k=-15

Answer 1

please tell me what does open mean

Answer 2

any letter like x =some number

Answer 3

hear k=15,
this could be true or false. this equation is mathematically open

Answer 4

open, when k=15 ,it is right

Answer 5

The equation reduces to k=15
this is an open equation because we do not have a mathematical check to see if k=15 or not. If the question said x=y this would also be open ,

to close either such equation requires and additional equation,