Question

for which equation is x=9 a solution

Answer 1

What are the equations?

Answer 2

For \(2x = 18\), if that's what you mean

Answer 3

@anickyan I think this is a multiple choice question, as there are infinitely many equations which have x=9 as solution

Answer 4

for example, it is a solution to \(x=9\)
or \(2x=18\) or
\[2x+3=21\] or
\[10(2x+3)=210\] etc

Answer 5

@thomaster, I am completely aware of that.