Hi Jessica,
For this algebra equation, you'll want to use substitution. Take the value of y (874.90) and plug it into your equation.
874.90 = (x * 0.4175) + x
Now let's combine the terms on the right side of the equation.
874.90 = 1.4175x (because 1x + 0.4175x = 1.4175x)
Next, divide both sides by 1.4175
874.90/1.4175 = x
So, x is approximately 617.21
(Note, it's always a good idea to check your answer. To do that, plug our answer for x back into our original equation and see if y turns out to be 874.90.)
10/25/2013

Katherine P.