The point (x, -2/5) lies on the graph of . the value of x is

Basically, all it's asking is solve the equation for x, and plug in the y-value which is given (-2/5) and find the value of x. 

So, let's find out the equation for x:





Now, we have an expression, we can just plug in the y-value given to us and solve for x:



Notice that the 5s cancel out and you are left with:




So, the x-value is 3!