Three that are equivalent are 12:9 8:6 28:21
the third option
because 1/3 is not equal to three
where as if we replace the x with one in all the other we would find that the equation is correct.
I’m pretty sure you add 78+55= 133
180-133=47
so 9x+2=47
subtract 2 from 47 and itself
so 9x=45
divide 9 and 45 by 9
so x=5
