
Ben K. answered 04/10/16
Tutor
4.9
(223)
JHU Grad specializing in Math and Science
Cross-multiply to get everything up top in the numerator.
(4-x) = x
Now group similar terms (that is, things with x's and regular numbers)
add x to both sides
Now we have
4 = 2x
Divide by 2 to get x by itself
2 = x
This is the answer, and I hope this helps!