Question

10. Solve for x given the point (x, 9) is a point on the line y = 3x + 7.​

Answer 1

Plug in the value 9 which represent the y coordinate in the place of y in the equation and solve for x

`9=3x+7\\3x=9-7\\3x=2\\\frac3{x}{3} =(2)/(3) \\x=(2)/(3)`

Therefore the point is

`((2)/(3) ,9)`

I hope I helped.