I think something is incorrect about the format of the question
However the way I would do it is go 6x-40=90
6x=130
x=21.67
If you get the answers back for this please share them I would like to see what they did because I feel that this is improbable
Another way you could do it is Add all of the x’s together and numbers to form the equation
14x - 19 =180
14x=204
X=14.57
